Product Description Specifications Brand: Maple Leaf Material: Rubber Color: Green Compatibility: Compatible with Marui / WE / KJ GBB Pistols, WE GBBRs and VSR-10 compatible Air Cocking Rifles. Package Includes: 1 X Rubber Bucking Features Made with rubber to tightly seal in position for increased velocity over a standard bucking Narrow entrance for improved sealing resulting in more consistent power output Hop-up performance and accuracy increased through pressure point geometry C-Clip to enhance lip stiffness for further sealing Compatible with Marui / WE / KJ GBB Pistols, WE GBBRs and VSR-10 sniper rifles Compatible with old style WE Tech gas blowback pistol or rifles 50 degree hardness WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov/product Customer Reviews