Action Army AAC-B02-007 Type 96 Hop Up Bucking for Maruzen Type 96 / Well APS2 / UTG 96 (Made in Taiwan)

This Hop Up Bucking is a great upgrade to ensure a better air seal and proper backspin on the BB during flight. The material used on this hop bucking is called "HNBR". Here is a short description on HNBR, Hydrogenated nitrile rubber (HNBR) is a viable<