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AR-15 FM-9 Heavy Buffer

Best price

$17.99at OpticsPlanet

Out of stock Sale checked Nov 10, 2026

Buy at OpticsPlanet

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OpticsPlanet Best price $17.99Salechecked Nov 10, 2026 Out of stock Buy at OpticsPlanet
Brownells Check priceprice on the store's site Out of stock Buy at Brownells

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Price history

Dashed line = out of stock. Tracking since Sep 28, 2026.

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Since Sep 28, 2026.

About this part

The AR-15 FM-9 Heavy Buffer is an AR-9 buffer part from FM Products Inc. One store lists it, OpticsPlanet at $17.99.

Specifications

Manufacturer
FM Products Inc
Platform
AR-9

From the manufacturer

Helps Keep Your Pistol-Caliber AR-15 Cycling Reliably

The Foxtrot Mike Products FM-9 Heavy Pistol Buffer is the correct weight to ensure reliable cycling of any blow-back operated AR-15 pistol action. With its extended length, the FM-9 Heavy Pistol Buffer requires no spacer and helps prevent bolt catch breakage. By installing this buffer, you’ll enjoy smoother function, less felt recoil, and reduced rate of fire from your AR pistol. The FM-9 is compatible with all 9mm upper receivers

  • Compatible with all blowback 9mm upper receivers
  • Salt bath Nitride Melonite/QPQ finish gives lubricity and wear-resistance
  • Heavy 6.4 oz. (pistol) weight

Foxtrot Mike’s FM-9 Heavy Pistol Buffer is the secret ingredient to make your AR-15 pistol reliable and smooth-cycling.

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$17.99 at OpticsPlanet
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