BCM AR-15 Low Profile Gas Block For .750" diameter barrel Available to order on-line. Ships in 5-14 days $50.00 MSRP Price: $48.13 Description Details Reviews Shipping info BCM Low Profile Gas Block for AR15" M16" M4" M4A1 for .750 barrels. For use on AR-15, M16, M4 and M4A1 Phosphate finished machine steel Barrel ID honed after finish per USGI TDP Set screw mounting UPC: 855877004138Manufacturer: Bravo Company USAModel: BCM-LGB-750Category: PartsOtherMisc AR-15 PartsStock: Ships in 5-14 business days.Unit/Measure: ea This item may be shipped directly to your home address, unless you live in a restricted state.