Whisper - Piston Head Part:O-ring only Delrin CNC machined

Delrin CNC machined

significantly higher tensile/compression strength and lower compression set compared to Viton/FKM

Wide Piston Rails with Deep Groove

It is truly indestructible and will withstand any build thrown at it

To not interfere with sector gear body

Whisper - Piston Head Part:O-ring only Delrin CNC machinedCopyright Airsoft Mutation Inc. All rights reserved. Threadlock (Blue) is still required Toss it in any build you want and expect it to last longer than anything in the gearbox besides the Jaeger. The Whisper is the highest performance polymer piston head on the market. Delrin CNC machined Very low coefficient of friction and extremely high impact resistance Elongated shaft to allow more AoE spacers Grade 12. 9 zinc plated screw Superior corrosion