RetroArms CNC Hop Up Chamber AR15 ULTRA JeffTron Constructed from CNC-machined aluminum with

Constructed from CNC-machined aluminum with an eye-catching red anodized finish

(No internals or grip screws included)

Suitable for high-speed and DSG builds

Avoid contact with plastics unless compatibility is confirmed

Reinforced gearbox shell for durability under heavy load

RetroArms CNC Hop Up Chamber AR15 ULTRA JeffTron Constructed from CNC-machined aluminum withBuilt for uncompromising accuracy and premium performance, the RetroArms CNC Hop Up Chamber AR15 ULTRA is a high end upgrade made from durable aircraft grade aluminum (EN AW 7075 T6). Designed specifically for AR15 M4 AEG platforms, the ULTRA version features enhanced geometry and improved contact points to deliver optimal hop up consistency and air seal, especially for precision builds. Features: CNC machined from EN AW 7075 T6 aircraft aluminum