The Tac-41 Damper Cylinder head is an upgraded head designed to pair perfectly with the W.A.S.P.
 
This is the GBB version, which comes in a few different variants depending on what you need.
It features a dual bore nozzle design and a built in 40A damper pad to reduce sound and vibration of the rifle.
 
This will work with SBA products too and some other aftermarket parts.
variants:
 
GBB Head and GBB brakes - For people running a tac-41 W.A.S.P
GBB Head Only - For people using other pistons with GBB brakes such as SBA
GBB Brakes Only - For people using another GBB head but wanting to use tac-41 W.A.S.P