This system will work with 300BLK and a Pistol Length Gas System.
The Adams Arms Piston System:
For 300BLK we only recommend a Pistol Gas Length (4.846" from barrel extension to shoulder) and a Low Mass Carrier for optimal performance.
We recommend using a standard barrel nut or barrel nut with similar measurements for proper fit and function of the kit. Many aftermarket proprietary barrel nuts do not offer the clearance for the drive rod or proper seating of the spring and bushing.
Micro Gas Blocks should have the set screws torqued to 87 in-lbs
Installation Instructions: CLICK HERE