Description
Product Description
MCS AR-15 300 Blackout Built Upper Receiver (MCS-BO-10)
Our Built Barreled Uppers are fully assembled in-house and ready to pin to your lower receiver. We use forged American-made receivers and US-made barrels—carefully selected for quality, reliability, and consistency.
The MCS-BO-10 Complete Upper features our ADZ Rail in several different colors, or classic black, with mil-spec Type III Hard-Coat Anodizing.
Specs
- Caliber: .300 AAC Blackout
- Barrel Length: 10.5“
- Barrel Material: 4150V Chrome Moly Vanadium, QPQ finish
- Barrel Twist Rate: 1:8
- Feed Ramps: M4, NiB finish
- Muzzle Thread Pitch: 1/2×28
- Gas System: Pistol-length
- Journal Size: 0.750″
- Muzzle Device: A2 Flash Hider
- Handguard Length: 10“
- Charging handle: Mil-spec
