Alexander Arms

Flat-top receiver 16.5 chrome moly barrel 1:20 twist rate and low-profile gas block with Midwest Industries free-floating four-railed handguard. Direct impingement operating system. Optionally threaded 49/64-20. Ships with one 7-round magazine. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required). Weight of upper is 4.45 lbs.