Main Military Weapon of Your Country. MMW A10

[New Korongo]

Grip looks so much like an AUG it's not even funny.

I will admit that I did trace the Mk18’s grip from an image of an AUG, whenever I attempt to draw one from scratch I always somehow get the proportions wrong and it is either too small for the rifle or just looks wonky.

EDIT - Since gun porn seems to have become obligatory:

[The Archangel Conglomerate]

^ This is true. It took eight tries to manage my pistol grip, and it still looks like ass.

[Sevvania]

Grip looks so much like an AUG it's not even funny.

I will admit that I did trace the Mk18’s grip from an image of an AUG, whenever I attempt to draw one from scratch I always somehow get the proportions wrong and it is either too small for the rifle or just looks wonky.

EDIT - Since gun porn seems to have become obligatory:

What is that? It looks like something that was assembled by Jawas.

[Virana]

I've been trying to do my research but it's been relatively unsuccessful due to a major lack of information (and the only bits and pieces of info that I've been able to glean are on like, AR-15 forums or airsofters arguing).

I've been designing a service rifle for a while now, and the question I'm mulling over is a straight line recoil design. I know that such a design, used by AR-15 and derivatives, involves aligning the bore, pistol grip, and stock on the same line to focus the recoil straight into the shoulder, and the recoil spring inside the rifle is in the stock directly behind the action in line with the bore.

Some places I've read that such a design is only really possible with a direct impingement system, but the service rifle I'm making is a short stroke piston operated rifle. Because of my rudimentary (and, overall, elementary) understanding of how guns work, piston systems have more moving parts and thus generally don't have straight line recoil.

I was considering studying current piston systems that are potentially AR-derived to see how they handle the issues, and I got mixed or no results. Tried figuring out this kind of info on the ACR, SCAR, XCR, HK416, and other similar AR-derived piston-operated rifles. All I got was the ACR's recoil spring is located above the bore axis in the receiver.

I'd like for someone to explain to me these details if at all possible, if someone has experience with these weapons.

One source said that the SCAR has a recoil spring that fits entirely in the upper receiver, but it didn't specify if it is in line with the bore axis.

Is it possible to have a recoil spring fit entirely in the receiver that is in line with the bore axis without unnecessarily lengthening the receiver? Or would I have to do something similar to the AR-15 and have the spring extend into the stock? Additionally, how viable is such a straight line recoil system for a gas piston operated system?

One of the main reasons I'm asking is because I wanted to see if it's possible to incorporate a folding mechanism for the stock.

[Vareiln]

Grip looks so much like an AUG it's not even funny.

I will admit that I did trace the Mk18’s grip from an image of an AUG, whenever I attempt to draw one from scratch I always somehow get the proportions wrong and it is either too small for the rifle or just looks wonky.

EDIT - Since gun porn seems to have become obligatory:

What the hell is that?
Also, great to see you again.

[Nirvash Type TheEND]

Straight line recoil. There's no fancy tricks or technology to it. It's just a talking point to sell more rifles.

[Vareiln]

Straight line recoil. There's no fancy tricks or technology to it. It's just a talking point to sell more rifles.

Smells of HK.

[Virana]

Straight line recoil. There's no fancy tricks or technology to it. It's just a talking point to sell more rifles.

I was referring more to the placement of the recoil spring. I've seen people here (Corda maybe? idk) and on several sources claim it as having been one of the strongest points of the AR-15 design.

[Hurtful Thoughts]

Hurtful Thoughts (AKA HT, Hurty)
Allus Nuclearus

One of the really ancient members of these threads whose love of nuclear weapons and mech-killing 6.5mm round is legendary. While a somewhat rare sight in the thread, HT is a very knowledgeable person who tends to take a bare bones approach to everything. Not much is known of Hurty’s life. Unlikely to attack, except if you install a safety on your rifle. Sarcasm likely.

Hurrrrrr.

Before the 6.5 nuttism, it was 35mm man-cannons... to the point someone was mistaken for being me for even uttering the caliber...

[The Archangel Conglomerate]

Nevermind

[Nua Corda]

I've been trying to do my research but it's been relatively unsuccessful due to a major lack of information (and the only bits and pieces of info that I've been able to glean are on like, AR-15 forums or airsofters arguing).

I've been designing a service rifle for a while now, and the question I'm mulling over is a straight line recoil design. I know that such a design, used by AR-15 and derivatives, involves aligning the bore, pistol grip, and stock on the same line to focus the recoil straight into the shoulder, and the recoil spring inside the rifle is in the stock directly behind the action in line with the bore.

Some places I've read that such a design is only really possible with a direct impingement system, but the service rifle I'm making is a short stroke piston operated rifle. Because of my rudimentary (and, overall, elementary) understanding of how guns work, piston systems have more moving parts and thus generally don't have straight line recoil.

I was considering studying current piston systems that are potentially AR-derived to see how they handle the issues, and I got mixed or no results. Tried figuring out this kind of info on the ACR, SCAR, XCR, HK416, and other similar AR-derived piston-operated rifles. All I got was the ACR's recoil spring is located above the bore axis in the receiver.

I'd like for someone to explain to me these details if at all possible, if someone has experience with these weapons.

One source said that the SCAR has a recoil spring that fits entirely in the upper receiver, but it didn't specify if it is in line with the bore axis.

Is it possible to have a recoil spring fit entirely in the receiver that is in line with the bore axis without unnecessarily lengthening the receiver? Or would I have to do something similar to the AR-15 and have the spring extend into the stock? Additionally, how viable is such a straight line recoil system for a gas piston operated system?

One of the main reasons I'm asking is because I wanted to see if it's possible to incorporate a folding mechanism for the stock.

Nonsense. Direct impingement is hardly necessary, and has little to do with it. The same can be achieved with various forms of blowback, or short stroke pistons. Not so much long strokes, as they tend to throw off the balance of the bolt, and it pretty much has to be rotating bolt or blowback, since tilting bolts will do the same. Piston systems typically require significant bolt carrier volume above the bore, which is what throws it off, rather than moving parts.

Most of them are, because in order for the hammer to strike the firing pin, they have to be. The AR gets around this by using a funky bolt carrier with a slot in the middle for the hammer, but this makes for a very long weapon. Observe:



It's rather simple:

1. Straight line design serves less to reduce recoil, as much as to reduce muzzle flip. If the main mass is above the pivot point of the stock on the shoulder, you get more muzzle flip, because the weapon acts like a lever against the shoulder, pivoting upward. If the main mass is in line with that pivot point, all of the recoil goes directly into the shoulder, and is absorbed, translating into less muzzle flip.

2. The combination of a gas system setup that doesn't generate a lot of mass above the recoil line and a funky bolt carrier that allows the springs to be positioned along that line, allows the AR to achieve this.

3. However, this makes for a rather lengthy action, as we see with the AR's buffer tube and inability to accept folding stocks. Thus, most other guns position their springs above the recoil line, and since most piston actions are placed above the bore, and strike the bolt carrier above the bore, they tend to have a lot of mass above the recoil line as well. This is done to allow the hammer to strike the firing pin uninterfered.

If we examine the SCAR's internals;



We see that the spring rides above the bore, and thus the recoil line.

Yes, on both counts. However, you'll have to pull some acrobatics. The first obvious solution is a striker fired system. This eliminates all that bother with the hammer, and leaves you free to position your springs wherever you like. The second is to change how your piston strikes. For my OICW's KE module, the piston is under the barrel, and strikes an operating rod that in turn strikes the sides of the bolt, eliminating the need for bulk above the recoil line. This does, however, create an issue of ejection: not a problem for me, since I'm using a mid eject system that casts the shells from a tube above the bolt carrier, but for a traditional rifle this would be a problem. You'd have to work around that.

It would be possible. It would be better to just come over to the dark side and bullpup it.

[Transnapastain]

Shit pistol is shit

But I still love it and had to give it a home in Costa Mejis.

[Nua Corda]

Shit pistol is shit

But I still love it and had to give it a home in Costa Mejis.

Despite being hilariously ineffective, it is a very cool design.

[Anarcho-Leftist States of Horseflip]

Shit pistol is shit

But I still love it and had to give it a home in Costa Mejis.

It's like an automatic 10/22 that you can fit in your pocket. What's not to love? Also, I have a hardon for industrial tubing on firearms

[Puzikas]

I opted to draw Tran's rifle.
I suck at drawing, but, you know. Gotta learn some how.

---

RAI-12

RAI-12

Service History

• In Service: 2013
• Used By: Costa Mejian Armed Forces, Puzakk Alfa Teams in Costa Mejis
• Wars: None

Production History

• Designed: 2009
• Designer: Mikhail Kalashnikov, Petrov V. Yargin, Fedor M. Zylkin
• Manufactured by: Armeria de Milicia de Costa Mejis, Izhveck Mechanical and Dynamics plant
• Produced: 2012-present
• Number Built: ~123,650
• Variants:
  • IAR-12
  • TD-12

Specifications

• Weight: 3.5kg (Empty) (7.7lbs)
• Length: 1052mm (stock extended) (41.4 inches)
  808mm (stock folded) (31.87 inches)
• Barrel Length: 510mm (20 inches)
  

  ---

• Cartridge(s):
  • 6.45x47 PLU
• Action: Gas Operated, rotating Bolt, BARS
• Rate of Fire: 550 Rounds mer minute
• Feed System: 45, 30, or 20 round Box Magazine
• Sights: Telescopic or Iron

Background

In order to replace the aging AKM and AK-74 series of Rifles in their arsenal, The Democratic Republic of Costa Mejis Requested the design and development of a new rifle and new cartridge, based on published reports from the Puzakk Padalka commission and inquisitions there in. In 2009, The first prototype rifle in the new cartride, 6.45x47 PLU, was developed under the name Project Dymka (Haze), and the first 100 rifles were submitted for testing under the name Object 112-(001-100). In 2010, the trails reported 12 of the original 100 prototypes suffered issues in cycling and damaged gas traps. This was due to an initial issue with the Gas Regulatory Valve, which was changed by adapting the much stronger Saiga-12-IV gas valve to the new rifles, and a replacement of the gas traps walls, by thickening them .1mm and adding in a 15% thicker chrome line. These rifles were re-manufactured and tested independently at the Standard Environmental Stresses and performance lab in Batumi, Puzakk Federation. The tests concluded the rifle preformed 20% better than previous versions, and was dubbed Object 512, and an inital run of some 1,100 versions were manufactured at the Izhveck Mechanical and Dynamics plant.

These rifles were submitted for testing with the Costa Mejin military, with supervision by the Mejian-Puizakk Military Performance Labs and the Office of Puzakk Special Services. The rifles preformed an average of 45% above par of the requested values, as concluded in the Usumacinta Report. The rifle was suggested for adoption in December of 2011, and after further trials, was adopted in 2013 as the RAI-12.

Construction and Design

---

The RAI-12 is based off the Kalashnikov-Style action, supplemented with a BARS recoil-reducing design. This design was chosen due to pre-existing machinery in use in Costa Mejis, that would allow 40% of the components of the rifle to be manufactured without the need of new machinery. The Kalashnikov action, additionally, is already used as the mainline rifle of Costa Mejis, the AKM and AK-74, allowing for a smooth transitional process. The BARS system reduces the recoil profile and impulse of the rifle down to a relatively low 8.9 joules of free recoil, similar to that in nature of the AKM.

This BBcode format courtesy of Nua Corda

Now, im sure your thinking: "The fuck is with that phat ass muzzle?"
Well, that muzzle comes from an experimental rifle in 6x49 Unified I shot some time ago. It acts as a muzzle break, sound suppressor, and flash suppressor. It also helps the rifle capture the gases in order to make the BARS more effective.

[Transnapastain]

Shit pistol is shit

But I still love it and had to give it a home in Costa Mejis.

It's like an automatic 10/22 that you can fit in your pocket. What's not to love? Also, I have a hardon for industrial tubing on firearms

The main problem is it fires from an open bolt...meaning the slide has to be pulled back before being fired or carried with the slide locked back....scary!

Shit pistol is shit

But I still love it and had to give it a home in Costa Mejis.

Despite being hilariously ineffective, it is a very cool design.

Its so cute! I figured it'll do fine for downed airmen and the suppressed version could be funny for operatives

I anticipating RPing its hilarity here after a while.

[Anarcho-Leftist States of Horseflip]

el-snippo

Open bolt pistols and pocket carry make for an exciting day

[Nua Corda]

It's like an automatic 10/22 that you can fit in your pocket. What's not to love? Also, I have a hardon for industrial tubing on firearms

The main problem is it fires from an open bolt...meaning the slide has to be pulled back before being fired or carried with the slide locked back....scary!

Despite being hilariously ineffective, it is a very cool design.

Its so cute! I figured it'll do fine for downed airmen and the suppressed version could be funny for operatives

I anticipating RPing its hilarity here after a while.

"Da fook?! Did you jis shoot me with a fookin' BB gun? Fookin' cunt!"

[Ea90]

(Image)

watisthisidonteven

[Samozaryadnyastan]

It's the left side of the Charlton Automatic Rifle.
The side that is apparently inexplicably uglier than the right.

Possibly because there's no steampunk-esque components on that side.

Take a break from your shit fest and take a look at a work in progress.

All you need to know on Trans new round, as designed by Aqi and myself (thanks man, if you're wondering how I got it to work in a shorter barrel, TG me)

---

6.45x47 PLU

6.45x47 PLU

Stats

Type:	Service rifle, intermediate
Designer:	Central Institute of Precision Machining
In Use:	2013
Parent Case:	Unknown (Belived to be 6x49 unified)
Bullet Diameter:	6.45mm (.2539 inches)
Neck Diameter:	7.42mm (.2850 inches)
Shoulder Diameter:	11.23mm (.440 inches)
Base Diameter:	11.42mm (.451 inches)
Rim Diameter:	11.53mm (.458 inches)
Rim Thickness:	1.37mm (.0539 inches)
Case Length:	46.8mm (1.842 inches)
Overall Length:	61.25mm (2.41 inches)

Varients

• 105gr FMJ (1P8)
• Armor piercing (1Pz9), silver tip
• Spotting (1K8), White tip
• Tracer (1Pt7), Green tip
• Incendiary (1Pb4), Red tip
• 240gr Subsonic (2Bs8), Black tip
• Long Range [5P8], Blue tip

History

---

6.45x47 PLU (Pan Latin Union) is a Centerfire Military Service Cartridge. Developed on request of the Costa Mejian military in 2008-2009, 6.45x47 PLU was born out of the need for a standard issue rifle cartridge that was suitable for use in Kalashnikov-pattern rifles, while maintaining a low recoil profile and the ability to shoot at extended ranges, due to the environment the Costa Mejian military operates in. Supposedly inspired by the failed 6x49 Unified rifle cartridge, the Central Institute of Precision Machining developed the cartridge after six months of testing, producing the first working rifle prototype in May of 2009. Following excessive trials by Puzakk and Costa Mejian forces, the round became adopted as the mainline Military rifle of Costa Mejis officially as of May, 2013.

Design

---

By using a slender, high Ballistic Coefficient projectile in a bottleneck case, 6.45x47 obtains a relatively high muzzle velocity from the standard issue RAI-12 (Manufacturing designation AK-213) service rifle, due to the cases large powder capacity and the highly aerodynamic nature of the projectile. Intermediate-range 6mm projectiles are, in generally, known for their high ballistic coefficient, which, according to the head of the cartridges project manager F.M. Zylkin, is what lead to the someone abnormal bullet diameter.

Variants

According to the design team, the cartridge will come in all standard military loading, though their exact weights are yet to be determined. The estimated weight of the standard military round was stated at between 105 and 110 grains, while the only exact amount given was a 240gr Subsonic load. The round is not expected to be marketed to Civilians, however, it has been marketed to the majority of the Pan Latin Union as a service rifle round, due to the nature of the environment in which much of the fighting is done.

---

This BBcode format courtesy of Nua Corda, Many thanks.

---

And Trans statblock for his TF rifle, which will be drawn up by Spree with any luck

---

RAI-12

RAI-12

Service History

• In Service: 2013
• Used By: Costa Mejian Armed Forces, Puzakk Alfa Teams in Costa Mejis
• Wars: None

Production History

• Designed: 2009
• Designer: Mikhail Kalashnikov, Petrov V. Yargin, Fedor M. Zylkin
• Manufactured by: Armeria de Milicia de Costa Mejis, Izhveck Mechanical and Dynamics plant
• Produced: 2012-present
• Number Built: ~123,650
• Variants:
  • IAR-12
  • TD-12

Specifications

• Weight: 3.5kg (Empty) (7.7lbs)
• Length: 1052mm (stock extended) (41.4 inches)
  808mm (stock folded) (31.87 inches)
• Barrel Length: 510mm (20 inches)
  

  ---

• Cartridge(s):
  • 6.45x47 PLU
• Action: Gas Operated, rotating Bolt, BARS
• Rate of Fire: 550 Rounds mer minute
• Feed System: 45, 30, or 20 round Box Magazine
• Sights: Telescopic or Iron

Background

In order to replace the aging AKM and AK-74 series of Rifles in their arsenal, The Democratic Republic of Costa Mejis Requested the design and development of a new rifle and new cartridge, based on published reports from the Puzakk Padalka commission and inquisitions there in. In 2009, The first prototype rifle in the new cartride, 6.45x47 PLU, was developed under the name Project Dymka (Haze), and the first 100 rifles were submitted for testing under the name Object 112-(001-100). In 2010, the trails reported 12 of the original 100 prototypes suffered issues in cycling and damaged gas traps. This was due to an initial issue with the Gas Regulatory Valve, which was changed by adapting the much stronger Saiga-12-IV gas valve to the new rifles, and a replacement of the gas traps walls, by thickening them .1mm and adding in a 15% thicker chrome line. These rifles were re-manufactured and tested independently at the Standard Environmental Stresses and performance lab in Batumi, Puzakk Federation. The tests concluded the rifle preformed 20% better than previous versions, and was dubbed Object 512, and an inital run of some 1,100 versions were manufactured at the Izhveck Mechanical and Dynamics plant.

These rifles were submitted for testing with the Costa Mejin military, with supervision by the Mejian-Puizakk Military Performance Labs and the Office of Puzakk Special Services. The rifles preformed an average of 45% above par of the requested values, as concluded in the Usumacinta Report. The rifle was suggested for adoption in December of 2011, and after further trials, was adopted in 2013 as the RAI-12.

Construction and Design

---

The RAI-12 is based off the Kalashnikov-Style action, supplemented with a BARS recoil-reducing design. This design was chosen due to pre-existing machinery in use in Costa Mejis, that would allow 40% of the components of the rifle to be manufactured without the need of new machinery. The Kalashnikov action, additionally, is already used as the mainline rifle of Costa Mejis, the AKM and AK-74, allowing for a smooth transitional process. The BARS system reduces the recoil profile and impulse of the rifle down to a relatively low 8.9 joules of free recoil, similar to that in nature of the AKM.

This BBcode format courtesy of Nua Corda

---

I do like, as a bit of IC flava, the "unknown parent case, possibly 6x49 Unified"
I think it makes a nice touch.

Except he isn't a dick and is worth of it.

No-one, but no-one, is worthy of hero worship. Better to carve out something of your own, than to cling to the coattails of others.

I'm relatively certain that there has been no-one who has done more to further the community's knowledge than Sumer, Vault and Munathanura (Aqi, but I actually learnt how to spell his old name )
In terms of armoured vehicles, I'm pretty sure his knowledge has been completely unsurpassed.

Screams too much civvie.

Not enough SAS.

SPEAKING OF SAS, MAYBE I SHOULD GET A BULLPUP FAL?

You do already have my Dobermans, supposedly.
Alternatively, you could go the Commonwealth route, whereby the Brits have adopted the AR-10 as the L129 and presumably Australia follows suit.

Grip looks so much like an AUG it's not even funny.

I will admit that I did trace the Mk18’s grip from an image of an AUG, whenever I attempt to draw one from scratch I always somehow get the proportions wrong and it is either too small for the rifle or just looks wonky.

EDIT - Since gun porn seems to have become obligatory:

You know what Corda, having now seen the Charlton Automatic Rifle from that side, I will concede it's an ugly fucker.

[The Archangel Conglomerate]

Right,
I a slight revision before bed.

1px=1mm

Believe it or not, this rifle and my latest PMG abomination are one and the same.

Comments, criticisms and helpful hints are welcome.

[Samozaryadnyastan]

Right,
I a slight revision before bed.

(Image)
1px=1mm

Believe it or not, this rifle and my latest PMG abomination are one and the same.

Comments, criticisms and helpful hints are welcome.

Start by tracing the PMG.
Always a good idea.

[Risen Britannia]

It was due to the receiver rails not being inline with the handguard rails

So elevate the receiver rails, or lower the hand-guard rails.

gawd fine!

[United Republics of Aralon]

I swore I was NOT going to do this. But I can't take the pressure.

Prototype time. Not finished yet but has texture. Also, the outlines suck because I shrank the image down quickly and without care.

(Image)

Very nice.
How did you do the texturing?

[The Archangel Conglomerate]

Start by tracing the PMG.
Always a good idea.

Alright, that's doable. It'll probably help with my horrible stock and pistol grip.

(Image)

Quite epic.
I hope to be this good someday.