The Geissele Super 42 braided wire buffer spring is a concept that is similar to a spring that was used in the German MG4 machine gun. The unique spring design utilizes three independent strands of wire which helps to act as a harmonic damper and energy absorber. The springs can flex separately from each other which allows you to displace excess energy which decreases the overall chance of having a spring failure. The result of installing this kit will be improved function along with enhanced reliability with your AR-15 platform rifle. Additionally the Super 42 features a 15% stronger average return force than the standard buffer spring and as such the use of .300 AAC Blackout Subsonic loads is not recommended.

Specifications and Features:
H3 Buffer
Designed to Improve Function/Reliability
3 Independent Strands of Wire
Provides Harmonic Dampening/Energy Absorber

Note: The Super 42 spring and Geissele buffer are designed to work together as a set; the spring will not fit over a standard buffer. If installed with a standard buffer damage to the rifle or receiver extension will occur..

Fits:
AR-15 Carbine Length Receiver Extensions (Buffer Tubes)

Does NOT Fit:
Rifle Length or A5 Receiver Extensions (Buffer Tubes)