The PDI W-Hold TM style hop-up bucking is designed for improved performance in TM VSR based sniper rifles, as well as TM GBB airsoft pistols. The W-Hold packing features external ridges which seal tightly for increased velocity.
The nub on the PDI TM bucking is a v-notch style, which stabilizes the BB for perfect spin.
PDI W-Hold TM GBB VSR Hop Up Bucking Features:
-Fits TM VSR Airsoft Sniper Rifles
-Fits TM GBB Airsoft Pistols
-Improved Air Seal