Product Description
MCS AR-15 .300 BLACKOUT 10.5 INCH PISTOL UPPER M-LOK 3-PRONG FLASH HIDER
The MCS Upper Build Kit is a 300 Blackout AR-15 pistol upper package centered on a 7075-T6 aluminum upper receiver, a 10.5 inch steel barrel, and a 10 inch ultra lightweight M-LOK handguard. This build includes a standard forward assist assembly and an ejection port door with rod and spring. The kit includes a 3-Prong flash hider, which supports modular suppressor mounting ecosystems.
Platform: AR-15
Caliber: .300 AAC Blackout (.300 BLK OUT)
Barrel Length: 10.5"
Barrel Profile: HBAR
Barrel Material: Steel
Barrel Finish: Parkerized
Twist Rate: 1:8
Thread Pitch: 5/8x24
Gas System: Pistol Length
Gas Tube: Pistol Length Gas Tube
Gas Block: Premium Low Profile .750 Adjustable Gas Block
Upper Receiver: AR-15 Upper Receiver
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Black Anodized
Feed Ramps: M4 Feed Ramps
Handguard: AR-15 Ultra-Lightweight Minimalist Rail, Partial Top Rail, 10"
Handguard Attachment: M-LOK
Anti-Rotation Tabs: None
Muzzle Device: 3-Prong Flash Hider
Forward Assist: Standard AR-15 Forward Assist Assembly
Ejection Port Cover: AR-15 .223/5.56 Ejection Port Door with Rod and Spring
