Colt EPR II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver Government Carbine Length 1-7 Twist 1/2x28 A2 Flash Hider Manganese. 56x45mm NATO 11.5in M-LOK Upper Receiver. Formulated working with several of the very most durable and long lasting substances around these AR15 Upper Receivers via Colt will provide you with a product that will give many years of stability. Colt has been making top quality products for a number of years and the Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is their very own approach to showing you just how much they are concerned. Right here at OpticsPlanet we ensure that it is our obligation to get the perfect product for all of your specifications and presenting the Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is something that we are happy to offer. Specifications for Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver: Manufacturer: Colt Caliber: 5.56x45mm NATO Barrel Length: 11.5 in Barrel Profile: Government Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Manganese Phosphate Color: Black Gun Model: M4 M16 AR-15 Fabric/Material: Aluminum Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: Picatinny M-LOK Gun Type: Rifle Gun Make: AR Platform Colt Flutes: No Bolt Carrier Group Included: MIL-SPEC Magazine Included: No Features of Colt LE6933EPRII Upper Reciever Kit: Package Contents: Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver What firearm models does the manufacturer say Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is compatible with? The manufacturer says that Colt Enhanced Patrol Rifle II Commando AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is compatible with AR-15 M4 M16Colt LE6933-EPRII-CK: Enhanced Patrol Rifle II Commando AR-15 5.56x45mm NATO 11.5in M-LOK Upper Receiver Government Carbine Length 1-7 Twist 1/2x28 A2 Flash Hider Manganese Phosphate Black