Colt EPR II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver Government Carbine Length 1-7 Twist 1/2x28 A2 Flash Hider Manganese Phosphate. 56x45mm NATO 16.1in M-LOK Upper Receiver then you have come to the absolute correct spot.. These AR15 Upper Receivers through the skilled product professionals at Colt are fashioned by using long lasting and dependable resources in order to supply you with a product which will be useful for countless years. Made using some of the very best available substances and design these AR15 Upper Receivers from the product professionals at Colt will last an incredibly lengthy time. Colt has been developing top quality products for a number of years and the Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver is their very own approach to showing you exactly how much they are concerned. Here at OpticsPlanet we ensure that it is our responsibility to obtain the best solution for your requirements and exhibiting the Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver is something that we're pleased to offer. Specifications for Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver: Manufacturer: Colt Caliber: 5.56x45mm NATO Overall Length: 24.5 in Barrel Length: 16.1 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: 7075-T6 Aluminum Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: M-LOK Picatinny Gun Type: Rifle Gun Make: Colt AR Platform Bolt Carrier Group Included: MIL-SPEC Magazine Included: No Features of Colt LE6920EPRII-Pro Upper Reciever Kit: Package Contents: Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver What firearm models does the manufacturer say Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver is compatible with? The manufacturer suggests that Colt Enhanced Patrol Rifle II Pro AR-15/M16/M4 5.56x45mm NATO 16.1in M-LOK Upper Receiver is compatible with AR-15 M4 M16Colt LE6920-EPRII-PRO-CK: Enhanced Patrol Rifle II Pro AR-15 5.56x45mm NATO 16.1in M-LOK Upper Receiver Government Carbine Length 1-7 Twist 1/2x28 A2 Flash Hider Manganese Phosphate Black