The "Quark" is a performance overhaul for your Hicapa, a complete kit that includes everything needed to turn a stock gun competitive. Note: Requires break-in period, may experience light striking/excess friction on initial (500+) cycles Featuring Printed in PPA-CF Lightweight, durable carbon fiber nylon Durability tested over 50k+ cycles (120+ PSI) Max. 200 PSI tested -> nozzle failure Includes Split Slide 2x Printed BBU X-Ring Piston Head For Improved Seal (13.6mm default) 10x Piston Head Sizes for compatibility with most nozzles .1mm increments [13.2mm-14.1mm] Half Cutoff + Full Cutoff Body Guide Rod Guide Plug CNC Aluminum Tracer Threads Various Short Strokes (Hard Rubber [TPU 95A]) Integrated Front & Rear Sights 1.5mm Green/Red Fibers 2x 180% Nozzle Spring Recommended Frame: TM, Guarder, 5KU CNC, AM (Tight) Hopup: TTI, 4UAD, NexxSpeed Bucking: ML Decepticon (70), Autobot (70), 4UAD, PDI W Hold Barrel: 118mm (4.3)/129mm (5.1) Laylax, PDI, DaVinci Length for 10mm barrel stickout Recoil Spring: OG TM up to 140% Nozzle: TM Original, EDGE Standard Blue, SSP5 Purple, ZCI (TM rocket valve), Guarder (TM rocket valve)