Bear Creek Arsenal, Llc Ar-15 Complete 16″ 300blk Upper Receiver M-Lok

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The Bear Creek Arsenal AR-15 complete 16″ 300BLK upper receiver with M-LOK handguard features a 1:7 twist with a carbine length gas system. The AR-15 complete 16″ 300BLK upper receiver from Bear Creek Arsenal is assembled with their M4 flat top receiver and is complete with the standard carrier group and charging handle. 5/8-24 threads 4150 chrome moly vanadium BCA does not recommend using steel cased ammunition with this receiver The AR-15 complete 16″ 300BLK upper receiver uses a parkerized barrel. Mfg: Bear Creek Arsenal, Llc