M4E1 Threaded 14.5" 5.56 Carbine-Length M4 QPQ Barrel No Forward Assist Complete Upper 13.5" Slimline Handguard - OD Green Anodized

This complete upper receiver features the same tried-and-true construction and aesthetics as our M4E1 Threaded Upper Receivers, without provisions for a forward assist.The slimline line of handguards have a unique milling profile, designed to maximize grip ergonomics and minimize weight while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. NOTE: This part features a colored anodized finish. These finishes are held to different aesthetic standards than parts finished in black anodizing or Cerakote. For more information on colored anodizing visit our Knowledge Center. Includes: M4E1 Assembled Upper Receiver without Forward Assist Slimline Handguard 14.5" 5.56x45mm NATO Carbine-Length M4 Barrel Low Profile Gas Block and Carbine-Length Gas Tube Product comes assembled This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tab The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16" as defined by the ATF for a rifle build. M4E1 Upper With No Forward Assist Features: No Forward Assist Custom enhanced forging that gives the upper receiver a "billet look" while maintaining the structural integrity of a forged part. Picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards M4 feedramps .250 takedown pin holes Slimline Handguard Features: Full top picatinny rail for optional attachments Full length MLOK attachment points at the 3, 6, and 9 o’clock positions Compatible with low profile gas blocks 1.3” Inside diameter 1.5” Outside diameter Compatible with mil-spec AR15 upper receivers and barrels NOT Compatible with M4E1 Enhanced Upper Receivers 14.5" 5.56 Carbine-Length Barrel Features: 5.56x45mm NATO QPQ Finish M4 Profile .750" gas block journal Carbine-Length gas system M4 Feed Ramp Extension HP and MPI tested Standard A2 flash hider