GUARDER Power Up Hammer Spring for MARUI G17 / 19 Gen5 MOS GBB

Enhanced hammer spring designed for Tokyo Marui G17 and G19 Gen5 MOS gas blowback pistols. Increases firing consistency and velocity while maintaining reliability. The power-up specification delivers improved performance for competitive play and extended skirmish use. Direct fit replacement for stock hammer spring, no modification required. Compatible with both G17 and G19 Gen5 MOS platforms. Ideal for players seeking performance upgrades without internal reshaping.