Foxtrot Mike Products Mike-9 AR9 Heavy Buffer - Carbine

The Foxtrot Mike FM-9 Heavy P.C.C. Buffer Kit pairs a properly weighted 9mm buffer with a premium .308 carbine recoil spring, giving blowback-operated pistol caliber carbines the reliable feeding and reduced bolt catch breakage a standard spring can't provide. Built for any blowback 9mm upper receiver, this AR9 buffer kit delivers smoother function, less felt recoil, and a reduced rate of fire.

Features:

• 6.4 oz weight
• 3.7" overall length
• Includes a .308 Carbine Recoil Spring
• Salt bath Nitride Melonite/QPQ finish
• Requires no spacer
• Compatible with all blowback 9mm upper receivers
• Helps prevent bolt catch breakage

Blowback-operated 9mm PCCs rely heavily on spring tension rather than a gas system to manage the bolt's cycle, so FM Products pairs this buffer with a premium .308 carbine recoil spring specifically to soak up that recoil impulse. This heavier spring is critical to reliable function on a 9mm blowback build, helping with feeding, reducing felt recoil, and preventing the premature bolt catch breakage that an underweight buffer and spring combination can cause.

Foxtrot Mike Products has built a reputation on genuinely different engineering solutions rather than incremental tweaks, applying that same focus to reliability-critical components like this PCC buffer and spring kit.