WPA Blast Master is designed to fit inside your WPA M-LOK handguard.
Slips over your barrel and fits inside handguard, or can be reversed to add length to your barrel for use with a longer handguard.
 
-Designed to push muzzle concussion forward and away from the shooter.
-Ideal for short barreled setups
-Compatible with all calibers
-Multiple thread pitches available
-Fits over barrels with up to 0.875" gas block
-1.23" OD
-2.0" long