FM Products 9mm Bolt Carrier and Heavy Buffer Kit
Glock-pattern 9mm bolt carrier kit with a carbine recoil spring and heavy buffer.
- Price
- $119
- Brand
- FM Products
- Category
- Bolt Carrier Groups
Featured in
Features
- •Complete FM9 bolt carrier group
- •Pre-hardened 4340 steel carrier
- •Salt bath nitride finish
- •.308 carbine recoil spring
- •About 6.5 oz heavy buffer
Capability Boosts
Recommended For
+11 more
Where to Buy
Compare current prices and availability from retailers we work with.
FM Products 9mm Bolt Carrier and Heavy Buffer, 6.5 oz, w/.308 Carbine Recoil Spring, Black, FM-9BCG-HB-RS
Price History
90-day low $118.99More PCC guides & articles
Guides
Overview
The FM Products 9mm Bolt Carrier and Heavy Buffer Kit includes the complete FM9 bolt carrier group, a .308 carbine recoil spring, and a heavy buffer for a Glock-style PCC build. The buffer weighs about 6.5 ounces, measures 3.7 inches long, requires no spacer, and helps prevent bolt catch breakage. The kit requires a carbine-length receiver extension. The bolt uses a pre-hardened 4340 steel carrier with a salt bath nitride finish, an M16 carrier profile, a staked gas key, a forged and machined S7 extractor, a nickel-boron-coated S7 firing pin, and a ramp for MIL-SPEC and 9mm hammers. It is made in the USA.
In an August 2026 bench test, the same FM 9mm Glock-style bolt family ran the Partisan Disruptor and Triggered Company LAT cassette FRTs without weight modification. That result applies to cassette systems only. Selector-style forced reset systems still require the internal weight to be notched or a pre-cut carrier.
Key Features
- Complete FM9 bolt carrier group
- .308 carbine recoil spring
- About 6.5-ounce heavy buffer
- 3.7-inch buffer that requires no spacer
- Pre-hardened 4340 steel carrier with salt bath nitride finish
- S7 extractor and nickel-boron-coated S7 firing pin
- Passed an August 2026 cassette FRT bench test without weight modification
Pros
- +Includes the bolt carrier group, recoil spring, and heavy buffer
- +The 3.7-inch buffer requires no spacer and helps prevent bolt catch breakage
- +The included bolt family ran two cassette FRT designs without weight modification in an August 2026 bench test
Cons
- −Requires a carbine-length receiver extension and a Glock-pattern lower
- −Selector-style forced reset systems still require a notched internal weight or a pre-cut carrier
Detailed Specifications
- caliber
- 9mm Luger
- type
- Bolt carrier and recoil-system kit
- boltMaterial
- Pre-hardened 4340 steel carrier
- boltFinish
- Salt bath nitride
- magazineCompatibility
- Glock-pattern magazines only
- carrierProfile
- M16
- gasKey
- Staked
- recoilSpring
- .308 carbine recoil spring
- bufferWeight
- About 6.5 oz
- bufferLength
- 3.7 in
- receiverExtension
- Carbine length
- spacerRequired
- No
- extractor
- Forged and machined S7 tool steel
- firingPin
- Nickel-boron-coated S7 tool steel
- hammerCompatibility
- MIL-SPEC and 9mm hammers
- countryOfOrigin
- USA
- manufacturerLocation
- Boise, Idaho
- manufacturer
- FM Products
- sku
- FM-9BCG-HB-RS
Similar Products
Compatibility Tags
Build Your Custom Configuration
Add the FM Products 9mm Bolt Carrier and Heavy Buffer Kit to your build and see how it enhances your platform.