Aero Precision M4E1 AR-15 16" CMV 5.56 Upper Receiver w/ 15" ATLAS S-ONE M-LOK Handguard

Give your next build a classic look with one of the industry’s go-to brands with the Aero Precision® M4E1 AR-15 16" CMV 5.56 Upper Receiver w/ 15" ATLAS S-ONE M-LOK® Handguard. The M4E1 Threaded Upper Receiver boasts M4 feed ramps for reliable feeding as well as .250" takedown pin holes for a solid fit with your Mil-Spec lower receiver. A new Picatinny profile blends seamlessly with Aero Precision’s Enhanced Series Handguards while new enhanced forging gives this upper receiver a billet look. Constructed with aluminum with an anodized finish and includes port door and forward assist installed. The ATLAS S-ONE handguard features a front and rear Picatinny rail with the center of the top rail eliminated for weight reduction. Indexing grooves in the 12 o’clock position allows positive grip control while quick disconnect (QD) sling sockets at 3, 6, and 9 o’clock positions allow you to use your favorite QD sling swivels. Featuring a 1.3" inside diameter and a 1.5" outside diameter, this handguard is compatible with Mil-Spec AR-15 upper receivers and barrels and it’s compatible with low-profile gas blocks.

The 16" 5.56 NATO barrel is constructed from Chrome Moly Vanadium steel with a corrosion-resistant QPQ finish. It’s gas port drilled and features a .750" gas block journal with a .0785" gas port. Compatible with mid-length gas systems, this barrel is HP and MPI tested, and it boasts an M4 feed ramp extension. Plus, it comes with a standard A2 flash hider installed. Product includes M4E1 threaded assembled upper receiver, ATLAS S-ONE M-LOK handguard, 16” 5.56 NATO barrel, low-profile gas block, and mid-length gas tube. Product comes assembled. Does NOT include BCG or charging handle. Made in USA.