Colt EPR II Commando Pro 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. These AR15 Upper Receivers through the skilled product specialists at Colt are designed working with dependable and reliable components to be able to provide you with product which will be useful for many years. Manufactured utilizing some of the best accessible components and design these particular AR15 Upper Receivers through the product experts at Colt will last an exceptionally lengthy time. Colt has been making top quality merchandise for a number of years and the Colt Enhanced Patrol Rifle II Commando Pro AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is their approach to showing you exactly how much they are concerned. Here at OpticsPlanet we ensure that it is our obligation to purchase the perfect product for all of your specifications and featuring the Colt Enhanced Patrol Rifle II Commando Pro AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is a thing that we are delighted to offer. Specifications for Colt Enhanced Patrol Rifle II Commando Pro 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 AR-15 M16 Fabric/Material: Aluminum Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: M-LOK Picatinny Gun Type: Rifle Gun Make: AR Platform Colt Bolt Carrier Group Included: MIL-SPEC Features of Colt LE6933EPRII-Pro Upper Reciever Kit: Package Contents: Colt Enhanced Patrol Rifle II Commando Pro 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 Pro 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 Pro AR-15/M16/M4 5.56x45mm NATO 11.5in M-LOK Upper Receiver is compatible with AR-15 M4 M16Colt EPR II Commando Pro 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 Phosphate Black LE6933-EPRII-PRO-CK