Vital part! - Rugged Suppressors Piston

This piston is exactly what I needed due to my barrel threads (metric) pitch. I ran approximately 200 - 250 rounds of varies subsonic ammunition with zero malfunction. The non slotted design reduces blowback keeping most of the gas forward from the operator face. The o-ring provide a snug fit, greatly reducing backing off.
Also consider purchasing additional o-rings for securing thread protector and general replacement!