I've been pleasantly surprised by the accuracy of my Piston AR. I think that was an early knock on piston uppers, mainly by piston haters or because of theories.
There has been some discussion in the past about piston guns being inaccurate or not as accurate as DI guns. I just picked up the September 2009 Guns & Ammo and on page 82 there is a piece written by Patrick Sweeny about the LWRCI M6A2 5.56mm. Paulo, if you feel the need to move this because it's not 6.8 I understand.
He conducted some 100 yard, five shot accuracy tests using a Leupold 3.5x10X scope.
Remington 55 gr FMJ - 1.5"
Federal 69gr Gold Medal Match - .80"
Hornady 60gr Urban - TAP - .75"
Wolf 62gr FMJ - 1.7"
Hornady 75gr TAP-precision - .75"
Fiocchi 69gr Matchking - .80"
Winchester USA 55gr FMJ - 1.2"
Black Hills 75 gr Heavy Match - .75"
The author reported zero stoppages and clean operation.
I know there are some DI guns out there that can shoot more accurately, but for a combat gun this is excellent. In any event, most people can't outshoot their guns anyway. Though this is 5.56 I'm pretty sure a 6.8 version with SSA's 115 grain OTM or 110 grain Pro Hunter would shine in a similar test.
6.8 Convert
I've been pleasantly surprised by the accuracy of my Piston AR. I think that was an early knock on piston uppers, mainly by piston haters or because of theories.
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I'm eagerly awaiting that LMT 6.8 piston changeover kit for the MRP. C'mon already.
In the beginning there were some piston systems that produced bad accuracy and many complaints, some of it due to a constant heavy spring pressure on the op rod and barrel. Companies are using revised systems and springs now, simple evolution to make their systems better and satisfy the customer.
Last edited by constructor; 08-31-2009 at 02:44 AM.
Don't get caught outgunned, step up to the 6.8mm
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Those are some good groups, along with some ok ones. All which can be expected from either type of platform and any rifle can be a picky eater as we all know.