FM Products 9mm Bolt Carrier and Heavy Buffer 6.5 oz w/.308 Carbine Recoil Spring Black

FM Products 9mm Bolt Carrier and Heavy Buffer 6.5 oz w/.308 Carbine Recoil Spring Black. C.C. Each kit contains a complete Premium FM9 Bolt Carrier Group BCG .308 Carbine Recoil Spring and a Heavy Buffer to ensure proper function on your 9MM Glock Style P.C.C. Build. The 6.4oz Heavy Buffer is the perfect weight to ensure reliable feeding of any blow-back operated P.C.C. 3.7 inch overall length requires no spacer and helps prevent bolt catch breakage. Smoother function less felt recoil and reduced rate of fire from your AR pistol. The FM-9 Heavy Buffer Kit is compatible with all 9mm upper receivers FM Products uses a Premium .308 Carbine Recoil Spring to soak up the recoil impulse created by Blow Back platforms. The extra heavy duty recoil spring helps with feeding and reliability and is critical to reliable function of a 9mm Blow Back gun. Specifications for FM Products 9mm Bolt Carrier and Heavy Buffer: Manufacturer: FM Products Color: Black Finish: Salt bath Nitride Melonite/QPQ Fabric/Material: 4340 Steel Caliber: 9mm Luger Gun Make: AR Platform Gun Model: AR-15 Weight: 6.4 oz 6.5 oz Condition: New Additional Features: .308 Carbine Recoil Spring Included Accessories: S7 Tool Steel Extractor and S7 Tool Steel Firing Pin coated in Nickel Boron Muzzle Device: Micro Blast Diffuser Features of FM Products Glock Style 9mm Builders Essentials Kit Compatible with all blow-back 9mm upper receivers; Salt bath Nitride Melonite/QPQ finish gives lubricity and wear-resistance; Heavy 6.4 oz. (pistol) weight; Kit comes with a .308 Carbine Recoil Spring to ensure proper function of your 9mm P.C.C. Build; Premium 4340 Steel Bolt Carrier machined pre hardened; S7 Tool Steel Extractor; S7 Tool Steel Firing Pin coated in Nickel Boron; Deep Black Melonite finish gives lubricity and wear-resistance; Removable weight compatible with all PDW stocks and Captured Recoil Systems on the market; Ramped to accommodate both MIL-SPEC and 9mm hammers; Premium Chrome plated firing pin; Forged then precision machined extractor made from S7 tool steel; M16 profile; Manufactured with ISO:9001 and AS:9100 quality certifications; Premium one piece design much stronger than 2 piece BCG on the market; Extractor spring and Hardware made to Colt Spec Package Contents: FM Products 9mm Bolt Carrier and Heavy Buffer What firearm models does the manufacturer say FM Products 9mm Bolt Carrier and Heavy Buffer is compatible with? The manufacturer says that FM Products 9mm Bolt Carrier and Heavy Buffer is compatible with AR-15FM Products FM-9BCG-HB-RS: 9mm Bolt Carrier and Heavy Buffer 6.5 oz w/.308 Carbine Recoil Spring Black