Check the listing for details. TTI AIRSOFT Infinity TM Spec Gen4 G17 Glock One Piece CNC TDC Hop Up Chamber-BK. Condition: New. Listed at 78.00 USD. !!!SHIPPING FREE PROMOTION!!! (For Airsoft Only) TTI AIRSOFT Infinity Tokyo Marui Spec Gen4 G17 One Piece Full CNC TDC Hop Up Chamber-Black Manufacturer: TTI Airsoft / Made in TaiwanSuitable: Tokyo Marui Spec Gen4 G17 GlockMaterial: AluminumColor: BlackConstruction: Full CNC MachinedWeight: 25.00g This fantastic one-piece design is expertly crafted from full CNC production with the Tokyo Marui specification in mind. The TDC Hop-Up ensures a higher rate of accuracy and heightens performance. Get ready to play with precision and optimal performance! Important Notes: VFC/Elite Force Glock & Some WE Glock do not be suitable. Feature:- TDC Hop-Up Pressure Adjustment- 7075 Aluminum Alloy CNC Process One Piece Hop-Up Chamber- Hop-Up Bucking Warp-Around Design, makes a Better Seal- C-Clip with Screw Design make Inner Barrel more Fixed and Center- Hop-Up Adjustment by Hand or 2mm Allen Key Design- Damping Prevents Reverse Design and Tightening the Screw can Fix the Wheel- Inner Barrel ( Hop-Up Chamber ) Horizontal Adjustment Screw Design- Fixed Screw Design Can be Fixed Whole Chamber with the Frame