Rugged Piston – 9/16×24

*M16x1 LH Piston is NOT compatible with Kriss Vector Firearm Hosts

This piston uses a non-slotted design creating a full circumference gas seal. This drastically lowers gas blowback for a more enjoyable shooting experience. Machined from 17-4 Stainless Steel and heat treated this piston is built to last.