Bear Creek Arsenal BC15 .350 Legend 16in Bolt Action Style Upper Receiver Heavy 1-16 5/8x24 Flash Hide Nitride. Customers in the states of CT IL and WA can ONLY purchase a bolt action style product from our website. Adding any other product to your cart will not allow you to check out. Magazine not included. Specifications for Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver: Manufacturer: Bear Creek Arsenal Caliber: .350 Legend Barrel Length: 16 in Barrel Twist Rate: 1-16 Threads per Inch: 5/8x24 Muzzle Device: Flash Hider Color: Black Gun Model: AR-15 Handguard Length: 15 in Gun Rail: M-LOK Gun Make: AR Platform Weight: 5 lb Flutes: No Package Contents: Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver What firearm models does the manufacturer say Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver is compatible with? The manufacturer says that Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver is compatible with AR-15Bear Creek Arsenal UABA382350LCHB16116SSBCF15ASR: BC15 .350 Legend 16in Bolt Action Style Upper Receiver Heavy 1-16 5/8x24 Flash Hide Nitride