Geissele Automatics Super 42 AR-15 H3 Buffer With Braided Wire Spring - Carbine

The Geissele Super 42 Spring brings a three-strand braided wire design to AR-15 buffer systems, inspired by the German MG42 machine gun, giving shooters improved reliability by letting each strand flex independently. Built to reduce spring failure and excess vibration, this AR-15 buffer spring delivers a stronger, more consistent return force than a standard mil-spec spring.

Features:

• Three independent braided wire strands, MG42-inspired design
• Acts as a harmonic damper and energy absorber
• 15% stronger average return force than a standard buffer spring
• Reduced spring "twang" felt and heard through the buttstock
• Reduced tendency to lose length and force over round count
• Carbine-length buffer tubes only

The three independent wire strands flex separately from each other, acting as a harmonic damper that displaces excess energy and reduces the chance of spring failure compared to a standard single-strand spring. The stronger 15% average return force helps strip rounds from the magazine even with a dirty weapon or steel-case ammunition. This spring is built specifically for carbine-length buffer tubes and is not compatible with rifle-length or A5 buffer tubes and receiver extensions; Geissele offers a separate rifle-length Super 42 spring for those configurations. It's also not recommended for use with .300 Blackout subsonic ammunition, since its stronger return force can be too powerful for the rifle to cycle reliably with subsonic loads.

Founded in 2004 by Bill Geissele in Pennsylvania, Geissele Automatics built its reputation on precision AR-15 triggers before expanding into rail systems, gas systems, and recoil components. Their Super 42 line reflects that same attention to detail applied to spring and buffer tuning.