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Mfg Item #: UBEOTACT
Flat-top receiver 16.5 chrome moly barrel 1:20 twist rate and low-profile gas block with Manticore Arms Transformer Rail handguard. Direct impingement operating system. Barrel 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.