AAC MZLBRK 7.62 NON-SIL 5/8X24
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With a single, massive chamber and 1-3/8 inch overall length the NSM brake is AAC's most efficient recoil reducing design to date in terms of size-to-performance ratio. Nitride finish over heat-treated 17-4PH stainless. Length added to barrel 1.25 inches.