LAYLAX/FIRST FACTORY - SIG SAUER ProForce MPX EG Spring Guide / Smoother

SIG SAUER ProForce MPX Upgraded Spring Guide

● Ball bearings for reduced stress
● Strengthed designed
● Smoother operation

The upgraded ball-bearing spring guide for the SIG SAUER ProForce MPX provides ease of mind with a steel reinforced body and reduced friction of your spring. Easy drop in installation for an immediate smoother operation for your gearbox. ■Brand: PROMETHEUS(プロメテウス)

■ Compatibility:
SIG SAUER ProForce MPX AEG

■ Caution: ※FPS may vary slightly from the stock settings due to the added ball bearing rings.