Protect your hands and rails from your muzzle with this Aero Precision M4E1 Threaded 5.56 Mid Pencil Barrel w/ ATLAS S-ONE Handguard Complete Upper Receiver. These AR15 Upper Receivers built by Aero Precision feature an advanced handguard attachment system that is incredibly secure, yet easy to remove. Then, this Aero Precision M4E1 Threaded 5.56 Mid Length Barrel Complete Upper Receiver provides a front and rear Picatinny rail for weapon accessories like laser sights, lights and other attachments. This Aero Precision M4E1 Threaded Complete Upper Receiver w/ ATLAS S-ONE Handguard also has a .250 takedown pin hole for added portability, and there is an integrated port door for enhanced cooling. Pick up the complete Aero Precision M4E1 Threaded Barrel w/ ATLAS S-ONE Handguard Complete Upper Receiver to get a rugged and lightweight gun barrel for your project. Specifications for Aero Precision M4E1 16in Threaded 5.56x45mm Complete Upper Receiver with Flash Hider: Manufacturer: Aero Precision Cartridge: 5.56x45mm NATO Overall Length: 26 in Gas System Length: Mid Length Barrel Twist Rate: 1-7 Threads per Inch: 1/2×28 Muzzle Device: A2 Flash Hider Gun Model: AR-15 Condition: New Fabric/Material: 4150 CrMoV Gas Block Journal Size-Diameter: .750 in Handguard Style: Hybrid Rail Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Barrel Material: 4150 Chrome Moly Vanadium Gas System Type: Proprietary Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Features of Aero Precision M4E1 16in Threaded 5.56x45mm Complete Upper Receiver with Flash Hider: M4E1 Upper Receiver: New enhanced forging that gives the upper receiver a “billet look”; New picatinny profile that blends seamlessly with our Enhanced Series Handguards; M4 Feedramps; .250 takedown pin holes; Laser engraved T-marks; Port door and forward assist installed; ATLAS S-ONE Handguard: Front and rear picatinny rail; Eliminated center of top rail for weight reduction; Indexing grooves in 12:00 position for positive grip control; Quick disconnect sling socket 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 5.56 Threaded Barrel: QPQ, Gas Port Drilled; .0785 gas port; M4 Feed Ramp Extension; HP and MPI tested Package Contents: Aero Precision M4E1 16in Threaded 5.56x45mm Complete Upper Receiver with Flash Hider M4E1 Threaded Assembled Upper Receiver ATLAS S-ONE Handguard 5.56 Mid Pencil CMV Barrel Low Profile Gas Block and Mid-Length Gas Tube
6 reviews for Aero Precision M4E1 16in Threaded 5.56x45mm Complete Upper Receiver with Flash Hider
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nik –
Great, lightweight upper. You can’t goWrong with aero precision. The upper fits well with my lower and has enough rail to attach iron sights and a Red dot scope. The light weight barrel helps a lot in reducing weight. Overall, have shot about 300 rounds through it and has worked perfectly and accurately.For the price and quality I would definitely recommend this upper.
Blue Devil –
I got this for a budget build and it’s CLEAN!! Slapped a Nickel BCG and a CH with a Sig Red Dot I got from Optics Planet also. It’s a real nice set up for the dollar. Highly recommend… I actually have a 14.5” on the way also
SETH Eisman –
Works well with all of the lowers that I have, light and high quality!
beardedpagan –
Got this for a pretty good deal, came with a free AP MOE full lower parts kit for free, paid $562 out the door. But that’s not what makes this a 5 star product. Fit and finish are spectacular, it’s lightweight and has a comfortable ergonomic handguard. Mates up perfectly to my AP ar15 gen 2 lower(in kodiak brown) along with my AP buffer tube(also in kodiak brown) with a Magpul CTR stock. Besides it lookin bitchin, having an upper that is lightweight like this one makes moving around that much easier causing less fatigue especially during flat range exercises. And even though this upper setup is lightweight, by no means does it feel cheap or flimsy, it is solid and well built. I am absolutely stoked on this purchase : ]
Chris –
Aero makes great AR parts and this upper is no different. I put this on an Aero lower with a Geissele trigger and used an acog for an optic and i was hitting out to 300yds without any issies. You can never go wrong with Aero!
Andy R. –
I got the 14.7 inch pencil barrel upper. The barrel profile / length, and the M4E1 upper receiver with bolt assist are the main reasons I got this. Not a fan of the Atlas S-One handguard though. Funny thing, the handguard is where the quality control issue was. After opening the package I was inspecting the upper and noticed a rather large gap between the Picatinny rail on the upper receiver and the Picatinny rail on the handguard. I looked at the handguard attachment and noticed one of the taper lock nuts was slightly crooked and there was a tiny silver burr sticking out next to it. I tried removing the taper lock but the opposite taper lock nut was wedged up against the barrel nut. I had to use a punch and an armorers hammer to pop it out and remove the handguard. I noticed the barrel nut was scored and the tiny burr on the handguard had fallen off. I wiped everything down, and put the handguard back on. The taper lock went on straight so I think the burr caused the issue. Maybe the handguard was dinged right before assembly. I don't know but now I got a slightly dented taper lock nut and a small bare aluminum gouge mark were the burr was. Oh well, it is solid on the barrel nut and the alignment is now good. Before I was only thinking about swapping out the handguard, but now I am definitely going to change it. Maybe I'll go with the Atlas R-One (when they are back in stock) or something from Midwest Industries. Maybe I'll splurge and get a Geissele handguard.