Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver Heavy 1-7 1/2x28 Flash Hider Parkerized

Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver Heavy 1-7 1/2x28 Flash Hider Parkerized. This BCA AR-15 Complete 5.56 NATO Bolt Action Style rifle length upper has a 4.5'' heavy barrel with a parkerized finish and features a 1:7 twist rate. It includes the BCA Talon 4'' MLOK split rail an M4 flat-top 7075 billet aluminum upper receiver a BCA bolt carrier group a flash hider and a right-side bolt action style charger. This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. Magazine not included. Specifications for Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver: Manufacturer: Bear Creek Arsenal Caliber: 5.56x45mm NATO Barrel Length: 4.5 in Barrel Profile: Light Weight Barrel Twist Rate: 1-7 Threads per Inch: 1/2x28 Muzzle Device: Flash Hider Finish: Parkerized Color: Black Gun Model: AR-15 Handguard Length: 4 in Gun Rail: M-LOK Gun Make: AR Platform Weight: 2.75 lb Flutes: No Package Contents: Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver What firearm models does the manufacturer say Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver is compatible with? The manufacturer says that Bear Creek Arsenal BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver is compatible with AR-15Bear Creek Arsenal UABA374556MPHB45178754ASR: BC-15 5.56 NATO 4.5in Bolt Action Style Upper Receiver Heavy 1-7 1/2x28 Flash Hider Parkerized