Unused brass CNC hop up chamber by SHS/PPS. Made for use in Maruzen/Well L96 style airsoft guns. I bought this for a build but never ended up needing it. Comes with three grub screws used to stabilize the barrel. Unless otherwise noted, this item is still for sale! READ BEFORE DM: this is made for Maruzen-style L96 airsoft rifles. I am not able to confirm if it will work in builds not based on the Maruzen system. If you are unsure, look up what style of hop up your rifle uses before messaging questions. Thank you!