300 BLACKOUT PISTON UPPERS
Black Rifle Arms 300BLK gas systems are precisely tuned for reliability through a combination of gas port location and barrel length. Using the standard pistol length gas system with 8 and 10" barrels, and utilizing our 300BLK intermediate length gas system with 13.5 and 16” barrels enable us to locate the gas port in the optimal location to balance subsonic dwell time and supersonic pressure curve to offer ultra-reliability without add the complexity of a gas regulator.
Why Do You Not Offer A Gas Regulated 300BLK Uppers?
During the R&D process of developing our 300BLK piston series it was determined to be unnecessary to have an adjustable gas system. Moreover, 300BLK ammunition has proven too be problematic when used with a gas regulator. The regulators tend to seize up and upon examination large amounts of slag are present in the gas system. It is our belief that due to the burn rate of 300BLK powder and or bullet construction, particularly with subsonic bullets, part of the bullet material is being melted away and forced through the barrels gas port and into the gas system, seizing the regulator.