The HM Defense MonoBloc complete upper for the AR-15 has a 16 inch 4150 chromoly match-grade barrel with an integral gas block, midlength gas system, muzzle brake and a 10.375 inch free-float M-LOK rail. It includes the bolt carrier group and charging handle.
- Manufacturer Part # : 16MBUP556
- Type : Complete Upper
- Caliber : 223 Remington / 5.56x45mm
- Barrel Length : 16in
- Gas System : Midlength
- Handguard : 10.375in Free Float M-LOK
- Muzzle Device : Muzzle Brake
- Barrel Material : 4150 Chrome Moly
- Finish : Black Anodized
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