Dive into the world of 5.7x28mm and get the CMMG® BANSHEE™ AR-15 8" CM 5.7x28 Upper Receiver w/ EML7 7" M-LOK® Handguard for your next AR-15 pistol build. Designed to work with CMMG Mk57™ or standard AR-15 lowers (when used with 5.7 AR conversion mags), this upper receiver group features the Radial Delayed Blowback™ operating system for softer recoil impulse and reduced bolt weight compared to traditional straight blowback systems. This upper receiver group boasts an 8" 5.7x28mm barrel that features a 1:9 twist and 1/2x28 thread pitch for your favorite muzzle devices along with an MT barrel contour. Plus, the barrel is constructed with 4140 Chrome Moly steel and a corrosion-resistant salt bath nitride finish for long-lasting field use that’s ideal for rough and tough abuse. If that's not enough, this barrel comes with a CMMG ZEROED® Linear Compensator already mounted right out of the box. The upper receiver features a ZEROED Polymer Dust Cover and a continuous Picatinny top rail. This upper receiver is constructed from billet 6061-T6 aluminum with a corrosion-resistant Cerakote finish.

The EML7 M-LOK 7" handguard is where beauty combines with functionality making it the perfect finishing touch to this upper receiver group. The EML7 is constructed from aircraft 6061-T6 aluminum with a corrosion-resistant Cerakote finish. This handguard features M-LOK slots at 3, 6, and 9 o'clock positions as well as a unique Picatinny/M-LOK hybrid top rail to make accessorizing your firearm easier than ever. Includes 8" 5.7x28mm barrel, upper receiver with ZEROED Polymer Dust Cover, EML7 M-LOK 7" handguard, ZEROED Linear Compensator, ZEROED Ambidextrous Charging Handle, and bolt carrier group. Product comes assembled. Backed by CMMG lifetime quality guarantee.