Product Description
MCS AR-15 10MM CARBINE BUILD KIT - 8 OZ CARBINE BUFFER TUBE KIT + COMPLETE LOWER PARTS KIT + 10MM BOLT CARRIER GROUP & CHARGING HANDLE
Complete your 10mm AR build with the MCS lower completion package designed specifically for pistol caliber carbine performance. This Finish Your Lower Kit combines a complete Mil-Spec AR-15 lower parts kit, a 10mm pistol buffer tube assembly, a premium nitride-finished 10mm/.40 S&W bolt carrier group, and a Mil-Spec charging handle into one convenient bundle. Engineered around direct blowback operation, this kit provides the critical components needed to finish a stripped lower receiver while delivering reliable cycling and long-term durability for high-performance 10mm and .40 S&W AR platforms. Whether you're building a compact truck gun, range PCC, or defensive AR pistol, this package delivers the compatibility and reliability serious builders expect.
MCS 10mm Pistol Buffer Assembly
- Heavy-duty pistol buffer tube
- 8 oz stainless steel PCC buffer
- Recoil spring
- Receiver end plate
- Castle nut
MCS Bolt Carrier Group
- Complete 10mm/.40 S&W nitride bolt carrier group
- 9310 alloy steel bolt head
- 8620 alloy steel carrier body
- Cam pin
- Firing pin
- Firing pin retaining pin
- Extractor assembly
MCS Charging Handle
- Mil-Spec 7075-T6 charging handle
MCS Lower Parts Kit
- Black A2 pistol grip
- Pistol grip screw
- Pistol grip lock washer
- Trigger guard
- Trigger guard roll pin
- Trigger
- Trigger spring
- Trigger pin
- Hammer
- Hammer spring
- Hammer pin
- Disconnector
- Disconnector spring
- Safety selector
- Selector spring
- Selector detent
- Bolt catch
- Bolt catch spring
- Bolt catch roll pin
- Magazine catch
- Magazine catch button
- Magazine catch spring
- Front pivot pin
- Pivot pin detent
- Pivot pin detent spring
- Rear takedown pin
- Takedown detent
- Buffer retainer pin
- Buffer retainer spring
