4UANTUM Magnus Pro MCX APFG Hop-Up Chamber –

The 4UANTUM Magnus Pro MCX is a hop-up chamber machined from a single piece of 6061 aluminum. Its three-lug self-centering system and TDC adjustment allow for consistent hop-up adjustments, while its corrected geometry directs the chamber’s interaction with the bolt carrier rather than the nozzle, minimizing repeated impacts. Stiffer than the stock configuration thanks to its one-piece construction, it also helps secure the barrel on compatible APFG MCX GBB airsoft guns. The adjustment wheel remains accessible through the handguard openings for incremental adjustments without disassembly or tools.