Here's how the AK-107 works:


Here's LAV shooting one.



Why can't we make something similar in the AR15 or a less trashcan kind of design.

This is the work of about... 2 hours on Photoshop. Not an engineer, so there may be some major hang up. If not, someone in the industry... MAKE THIS!

No full auto, not needed.

For the same reason a bolt action would
Counterweight takes care of the reciprocating mass, brake deals with recoil from the bullet firing.

Seems unnecessarily complex.

Isn't the AR supposed to have less issue with that due to the fact the the moving pieces are all in line with the bore? The AK has the big piston and most of the bolt carrier moving back and forth well above the bore.

Send it to HK to add to their piston driven SAW replacement.

Damnit, why did you have to make this a joglee thread?

So, they added more weight and moving parts to fix the moving parts effect on accuracy.

Wouldn't the counter reciprocating mass have to be the same weight as the BCG to cancel out recoil? The rod in your picture doesn't look like it would cut it.

I don't think until we invent a radically new lightweight cartridge like something caseless, that it's worth inventing a new assault rifle.

No, the impulse from the firing of the bullet is different than the impulse of the bolt moving. One is quick, one is slow and behind it in time. I don't see how you'd make that work.

How about no.

The bigger news is that the LAV found a Russian Chris Costa.  Except he doesn't talk as much.

Attached File

"How to tame the 5.56!"

They hired Joe Biden to work on the design phase of this project.  He used the "We have to spend money to get out of debt" approach.

the AR15 already has less reciprocating mass

that's the beauty of a gas tube instead of a massive piston

.

Exactly. You can't improve on perfection.

LoL @ the end

Why would this be needed for the AR platform?

Not possible with thin cartridge cases that are deformable to the extent that they adhere to the chamber walls at high pressures. In an advanced ignition blow back design you could approach an ideal gun where a counter weight system could eliminate all recoil felt by the firing platform. However, those require very heavy bolts and springs even for simple one stage operation and I've never heard of a counterweight system on those.

Personally I would like to see counterbalance systems getting more traction. The performance gain is worth the increase in overall complexity from the user perspective. Whether that makes sense for a organizational angle, is a more broad discussion.

I would expect anyone who has competed in action sports with different styles of ARs to agree. While you probably can't appreciate the recoil mitigation difference shooting beer cans in your back yard, when it comes to Practical Rifle, 3Gun or IDPA DMG, having the least amount of recoiling mass, the least amount of gas used to drive it and the least amount of friction in the action are all very much desirable qualities.

The top of the game race ARs not only have huge comps and long heavy barrels, they also have aluminum, titanium or lightened steel bolt carriers, roller cam pins and a rifle gas system with the port adjusted to the minimum setting that will cycle the gun with the used magazines in the race conditions.

A typical AR15 steel bolt carrier weights over 9 oz, while race ones are between 3.5 and 4 oz. When you consider the bolt weight but also an empty buffer, the total weight of reciprocating parts is about 35% compared to a warhorse standard configuration.

NOOOOOOOOOOOOOOOOOOOO

Especially when 5.56 barely has any recoil anyway and full auto fire is almost never used.

The ones I ran on CoD were pretty sweet, I must admit.

Let me know when that system on an AR is as cheap and reliable as what wr have now. Until then, ZFG. It's a gimmick.

The impulse from the action and the bullet firing is not imparted at the same time or rate

@Bradders The impulse from the action and the bullet firing is not imparted at the same time or rate

Quote didn't work

What if I told you someone is?

Because the external piston is a step backwards, and recriproaring mass along the barrel is a lousy idea.

The benefit from a system like this isn't worth adding the failure points.

OP, put teeth on your BCG, teeth on your reverse op rod, and a gear in btwn.  No need for the long piston off the BCG.

Could have bolt/buffer directly behind chamber... or fuck it, add 2 pistons above each other and have them give each other reach arounds every time a round touches off.

Yeah, I will take an AR

If it ain't broke, fix it till it is.

Why do we need that in the AR platform? 

We don't.