Product Description
MCS AR-15 7.5" INCH .300 BLACKOUT PISTOL UPPER 1:8 TUBULAR HANDGUARD
The MCS .300 BO Upper is built around a 7.5-inch .300 Blackout barrel with an HBAR profile, finished in phosphate, paired with a MCS billet upper receiver. It pairs a 7-inch MFFAR7 free-float smooth handguard with an AR-15 birdcage flash hider at the muzzle, running on a pistol-length gas system.
A complete bolt carrier group and Mil-Spec charging handle round out the upper, giving the buyer everything needed on the upper side.
Caliber: .300 Blackout
Platform: AR-15
Barrel Length: 7.5"
Barrel Profile: HBAR
Barrel Finish: Phosphate
Twist Rate: 1:8
Gas System: Pistol Length
Gas Block Diameter: .750"
Upper Receiver: MCS Billet Upper Receiver
Upper Receiver Configuration: NOFA
Ejection Port: .458-Style Ejection Port
Handguard: 7" Free-Float Smooth Handguard, MFFAR7
Muzzle Device: AR-15 Birdcage Flash Hider
Muzzle Thread: 5/8x24
Crush Washer: 5/8", Black
Gas Tube: Pistol-Length Gas Tube
Gas Block: Micro Low-Profile Steel Gas Block
Bolt Carrier Group: Complete AR-15 5.56/.223/.300/.350 BCG, Made in USA
Charging Handle: Mil-Spec AR-15 M4 Charging Handle
Ejection Port Assembly: AR-15 .223/5.56 Ejection Port Door, Rod, and Spring
