Brand : 4UAD (4U-Tactical)

Material : Precision CNC-Machined Aluminum / Anodized Hard-Coat Finish

Compatible with : APFG MCX / Spear LT Gas Blowback Rifle Series

Weight : Approx. 45g - 55g

Length : Drop-In Hop-Up Chamber Unit

System : Gas Blowback Rifle (GBBR) Hop-Up Chamber & TDC (Top Dead Center) Adjustment System

This 4UAD 4UANTUM Magnus Pro TDC Hop Up Chamber Set for APFG MCX / Spear LT GBB Series is an advanced, high-precision hop-up chamber upgrade designed to drastically improve flight trajectory consistency and BB backspin adjustment on APFG MCX gas blowback platforms. Utilizing a TDC (Top Dead Center) vertical pressure design, it eliminates traditional side-biased arm deflection, ensuring perfectly centered, uniform downward pressure onto the bucking. CNC-machined from lightweight aluminum with tight internal tolerances, this chamber set minimizes air leaks, improves hop-up sealing, and provides micro-adjustable dial precision for fine-tuning heavy gram BBs over long-range engagements