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I designed this flash enhancer for the common 1/2x28 thread. They are available in 5.56 with 1/2x28 thread, 7.62x39 in both 1/2x28 and 1/2x36 threa...
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I have designed and patents pending on this.. Its a beltfed 12 gauge upper receiver for a ar-15 or m16 lower receiver. It uses your lower receiver,...
434,431 views