BCA Gearbox Upgrade Spring (M90-M150)
Brands are as follows: Ace1Arms / Core Airsoft / Blitz Tech Spring M90- 290 to 300 fps .20g BBs varies by AEG. Spring M100- 340 to 350 fps .20g BBs varies by AEG. Spring M110- 375 to 390 fps .20g...
ZTWWorks Steel Spring Guide Base for VFC QSC Spring Guide
These spring guide bases are 3D printed with 60% steel and 40% bronze binder. The wings are much thicker and are shape optimized to distribute load better, these are much stronger than the original VFC zinc base which is prone...
Tienly Super Rotary AEG Bearing Spring Guide (V2 / V3)
Tienly bearing spring guides feature high-quality ball bearings which allow the spring to rotate during compression and release freely. This alleviates binding of the spring and alleviates torsional strains on the spring - leading to more consistent FPS. The inherent thickness...