Foxtrot Mike Products Mike-9 RMB AR9 Heavy Buffer - Carbine

The Foxtrot Mike Mike-9 RMB (Recoil Mitigating Buffer) brings a finely tuned reciprocating mass to pistol caliber carbines, eliminating the bolt bounce that has long plagued traditional blowback-operated PCCs. Built with a sliding buffer body and dampening spring, this AR9 buffer delivers a soft, controlled recoil impulse that high-speed video testing confirms as 100% bolt bounce elimination when paired with FM's VFM-9 upper.

Features:

• 9.5 oz weight
• 4.125" length
• Chambered for 9mm Luger
• Sliding buffer body with reciprocating mass
• Dampening spring and urethane impact modifier
• Designed for FM's "Short Stroke" VFM-9 upper receiver
• Requires an A5 buffer tube for non-Short-Stroke PCC builds to ensure bolt lock-back
• Black finish

The sliding buffer body, dampening spring, and urethane impact modifier work together to absorb and dissipate recoil energy through the cycle rather than relying on raw mass alone, delivering a soft, controlled recoil impulse instead of the sharp bolt bounce common to blowback PCCs. This buffer is designed specifically around FM's Short Stroke VFM-9 upper receiver; builders using a different, non-Short-Stroke PCC upper need an A5-length buffer tube instead of a standard carbine tube to ensure reliable bolt lock-back.

Foxtrot Mike Products has built a reputation on genuinely different engineering solutions for nine years, and the RMB System reflects that same focus on solving a specific mechanical problem rather than just adding weight.