Posted June 28, 2016 6:00 am by Comments

By Nicholas C

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57Center makes the AR57. It is an upper receiver for your AR lower to shoot 5.7x28mm ammo. The only other guns that shoot this ammo is the FNH P90 and their handgun the Five Seven pistol. I got this pistol/SBR upper with a 6″ barrel. 57Center offers their uppers with a 16″ and 12″ barrels. […]

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