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This 10oz buffer works great in a short barrel AR9 pistol. It’s a bit longer than the normal buffer to help cycling blowback 9mm platform to not over extend towards the end of buffer tube. Works great with a super safety. Make sure to use a stronger firing pin spring on a FM9 or PCC BCG to prevent 2nd round dead trigger. The OEM spring is super weak and will get 2nd round dead trigger from a light strike. Stronger spring and heavy buffer (make sure it rattles to prevent bolt bounce) will correct SS failures.
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