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Questions & Answers
can this buffer be used in the Foxtrot Mike FMP-9?

I contacted FoxTrot Mike and I was informed it can be but you need the kit with the A5 buffer tube and spring.

by TOM, Verified Owner, January 6, 2026
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Product Info for FM Products Mike-9 RMB Heavy Buffer

Foxtrot Mike Products, a trusted name in firearm innovation for over nine years, proudly announces the launch of its latest advancement: the RMB (Recoil Mitigating Buffer) System. Designed specifically for pistol caliber carbines (PCCs), the RMB is a proprietary buffer system that dramatically improves performance, accuracy, and shooting comfort while maintaining the affordability and reliability that Foxtrot Mike is known for.image

This RMB Buffer is designed to be used with our VFM-9 Upper Receiver, as it is a "Short Stroke" style. If you are building your own PCC upper that is not "Short Stroke" style. you would need an A5 BufFer Tube to ensure bolt lock back.

At the core of the RMB is a finely tuned reciprocating mass that eliminates bolt bounce a long-standing issue in traditional blowback-operated PCCs. Combined with a sliding buffer body, a dampening spring, and a durable urethane impact modifier, the RMB system delivers a soft, controlled recoil impulse that users will feel immediately and high-speed video testing the RMB with our VFM-9 5 in confirms it: 100% elimination of bolt bounce.

Specifications for FM Products Mike-9 RMB Heavy Buffer:

Manufacturer: FM Products
Weight: 11 oz

Package Contents:

  • FM Products Mike-9 RMB Heavy Buffer

FM Products Mike-9 RMB Heavy Buffer Orderable Models

List of Orderable Models

  • FM Products Mike-9 RMB Heavy Buffer, 11 oz, MIKE-9-HB-RMB , MPN: MIKE-9-HB-RMB , Code: 3JR-RBF-FMUR11-MIKE-9-HB-RMB
  • FM Products Mike-9 RMB Heavy Buffer w/A5 Buffer Tube, 11 oz, MIKE-9-HB-RMB-KIT , MPN: MIKE-9-HB-RMB-KIT , Code: 3JR-RBF-FMUR11-MIKE-9-HB-RMB-KIT
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