Originally Posted by Amos
Airsoft research Syndicate hop-up rubber paired with a shredder's concave spacer.
Boom. Applications of high friction from a soft rubber while having a hard spacer to provide all the pressure on the BB that is required.
Best of both worlds!
Don't mean to thread jack -
You've preached ARS sleeves and scs's for awhile - just out of curiosity what type of inner barrels do you use?