- CNC Aluminum Constructed Chamber - Anodized Finished - One-Piece Chamber Design for Extra Stability - Top Dead Center ( TDC ) Hop Up Adjustment System - Step-less Adjustment Allows More Fine Tunning - T-N.T. Patent Hop Up Adjustment Method, Disassembly is Not Necessary - Comes With TL-HOP 60 Degree Bucking & STD Type Inner Barrel