Product Description
MCS AR-15 .300 BLACKOUT FDE 10.5" PISTOL BUILD KIT DROP-IN HANDGUARD W/SBA5 BRACE
The MCS FDE 300 BO kit is built around a 10.5-inch front sight base barrel chambered in .300 Blackout, with a Government profile finished from 4150 chrome moly vanadium steel. It's paired with a 7075-T6 aluminum upper receiver finished in FDE Cerakote. It pairs a carbine-length two-piece drop-in handguard, finished in flat dark earth, with a MCS GI-style birdcage flash hider at the muzzle, running on a pistol-length gas system. A complete MCS USA-made bolt carrier group, Mil-Spec charging handle, complete Lower Parts Kit, carbine buffer-system components, and an SB Tactical SBA5 adjustable pistol stabilizing brace round out the rest of the build.
Caliber: .300 Blackout
Platform: AR-15
Barrel: MCS 10.5-Inch Front Sight Base Barrel
Barrel Profile: Government Profile
Barrel Material: 4150 Chrome Moly Vanadium Steel
Twist Rate: 1:8
Gas System: Pistol-Length
Handguard Compatibility: Carbine-Length Drop-In Handguards
Gas Block Journal: .750-Inch Diameter
Muzzle Thread: 5/8x24
Front Sight Base: Fixed A2-Style Front Sight Base
Front Sight Components: USA-Made Steel Sight Post, Plunger, and Spring
Upper Receiver: MCS AR-15 Upper Receiver
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: FDE Cerakote
Upper Receiver Features: M4 Feed Ramps
Forward Assist: AR-15 Forward Assist Assembly Included
Ejection Port Door: AR-15 .223/5.56 Ejection Port Door, Rod, and Spring Included
Handguard: Carbine-Length AR-15 Two-Piece Drop-In Handguard
Handguard Features: Internal Heat Shield
Handguard Color: Flat Dark Earth
Delta Ring Assembly: Colt AR-15 Delta Ring Assembly, Barrel Nut Not Included
Gas Tube: Pistol-Length Gas Tube
Gas Block: Premium Low-Profile Adjustable Gas Block
Gas Block Size: .750-Inch
Muzzle Device: MCS GI-Style Birdcage Flash Hider
Crush Washer: 5/8-Inch Black Crush Washer
Bolt Carrier Group: MCS Complete USA-Made AR-15 Bolt Carrier Group
BCG Compatibility: 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend
Charging Handle: Mil-Spec Quality AR-15 M4 Charging Handle
Lower Parts Kit: MCS Complete Mil-Spec AR-15 Lower Parts Kit
Buffer Tube: MCS Mil-Spec Heavy-Duty Six-Position AR-15 Carbine Buffer Tube
Buffer: Standard AR-15 Carbine Buffer, 3 Ounces
Buffer Spring: Standard USA-Made AR-15 Carbine Recoil Spring
Castle Nut: AR-15 Carbine Castle Nut
End Plate: Mil-Spec AR-15/M16 Receiver End Plate
Pistol Brace: SB Tactical SBA5 Adjustable Pistol Stabilizing Brace
Brace Color: Black
