The PDI W Hold Chamber Packing (Bucking) has a unique W hold pattern nub inside the bucking that allows for a more even hop than traditional buckings resulting in greater accuracy. The W Hold bucking also comes with 2 additional external air seal ribs that help stabilize and seal your bucking to your hop unit for increased efficiency. Bucking is considered a soft bucking that is made out of a Nitrile rubber with 50 durameter hardness.
This specific bucking is meant for VSR-10 or guns that accept VSR Hop Up buckings such as certain Gas Blow Back Pistols.
