AR-15 Complete Uppers
Introduction to AR-15 Complete Uppers
If you're looking to construct a no-nonsense AR-15 that you know will work when it counts, purchasing either a complete rifle or an Ar-15 complete uppers from Black Rifle Depot is often the way to go. Buying direct from Black Rifle Depot ensures that all assembly, troubleshooting, and quality control are handled before the firearm reaches you—all covered by a manufacturer’s warranty and built to industry standards, ensuring reliability.
What is an AR15 Complete Upper?
AR-15 complete uppers come pre-assembled with all of the essential components needed to complete the upper portion of your rifle, including the barrel, handguard, gas system, and often the bolt carrier group and charging handle. These assemblies fit seamlessly with any standard AR-15 lower receiver you already have, allowing for easy customization and upgrades. You’re essentially building your own rifle in two simple parts – an upper and a lower. Opting for a complete upper totally eliminates the complexities and potential pitfalls of assembling an upper receiver part by part, saving you time and ensuring all components function harmoniously. Installing your new complete upper is as easy as popping two pins on your lower in and out.
Key Features to Consider
As you dive into our collection of uppers at Black Rifle Depot, there are a few key areas you should be thinking about. The beauty of the AR-15 is that the configurations available to you are almost endless. Unfortunately, this wealth of possibilities can also make shopping for a complete upper overwhelming. No worries, let's break down some main areas of focus as you determine the right upper for you.
Barrel Length and Material:
This is perhaps the most important question as you begin your journey to create your ideal AR. AR-15 complete uppers are available in various barrel lengths, typically 16", 18", and 20". As you consider purchasing a complete upper, remember shorter barrels offer maneuverability, while longer barrels somewhat enhance accuracy and velocity at extended ranges. As for what a barrel is made of, stainless steel provides corrosion resistance, whereas chrome-moly barrels are valued for their robustness. Several factors influence accuracy, including quality, chambering, and the ammo you go with. With all that said, if you're building your first rifle, you can't go wrong with a 16" at a price point that works for you.
Gas System:
The gas system is crucial to the AR-15's operation, with direct impingement and piston systems being the most common. As you consider purchasing a complete upper, note that direct impingement systems are standard and lightweight, while piston systems offer cleaner operation and reliability under adverse conditions. Most of the uppers you find at Black Rifle Depot operate using the classic direct impingement system, which we believe is the best approach for almost all shooters.
Chambering and Twist Rate:
Popular chamberings include 5.56 NATO, 300 Blackout and .223 Wylde. As you consider purchasing a complete upper, the twist rate, indicating how many inches it takes for the rifling to complete one full rotation, affects bullet stabilization. Common twist rates like 1:7, 1:8, and 1:9 suit different bullet weights and applications. For most, a 1:7 twist is a good place to start.
Reputation Matters:
Selecting a complete upper from reputable manufacturers such as Strike Industries, aero precision, Dirty Bird Industries and Blackrifledepot ensures quality and reliability. As you consider purchasing a complete upper, remember that craftsmanship and performance. If you see a lower that is dramatically more expensive, there is probably a reason, with corners being cut somewhere in the process. It never hurts to follow the old adage, “buy once, cry once.”
Durability and Reliability:
Durability is crucial, and AR-15 uppers are built to withstand rigorous use. As you consider purchasing a complete upper, note that corrosion-resistant coatings, robust materials, and high-quality manufacturing processes contribute to the longevity and reliability of the upper receiver.
Value Proposition
At Black Rifle Depot, the convenience of a pre-assembled upper, combined with the baked-in assurance of quality and performance, justifies the price. At Black Rifle Depot, you can have total confidence in any of the uppers we carry, which are from renowned names such as Aero Precision, Battle Arms Development, Colt, CMMG, Faxon, Foxtrot Mike, Dirty Bird, Geissele, Spikes Tactical, and Sons of Liberty. By choosing one of these AR-15 complete uppers from a trusted manufacturer, you get a dependable, high-performing rifle that meets your specific needs, whether for tactical use, competitive shooting, or hunting.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Aero Precision M4E1 Complete Upper 16" .300 Blackout Barrel EM-15 Gen 2 Handguard - Anodized Black
Aero Precision
MSRP: $660.00$573.95Aero Precision M4E1 Complete Upper 16" .300 Blackout Barrel EM-15 Gen 2 Handguard - Anodized Black This Complete Upper includes Aero Precision's Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced...MSRP: $660.00$573.95 -
Aero Precision M4E1 Complete Upper 8" .300 Blackout Barrel EM-7 Gen 2 Handguard - FDE Cerakote
Aero Precision
MSRP: $635.00$549.95Aero Precision M4E1 Complete Upper 8" .300 Blackout Barrel EM-7 Gen 2 Handguard - FDE Cerakote This Complete Upper includes Aero Precision's Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced...MSRP: $635.00$549.95 -
Out of stock
Aero Precision M4E1 Complete Upper, 7.5" 5.56 Barrel, EM-7 Gen 2 Handguard - FDE Cerakote
Aero Precision
MSRP: $459.99$367.95Aero Precision M4E1 Complete Upper, 7.5" 5.56 Barrel, EM-7 Gen 2 Handguard - FDE Cerakote This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced milling design for grip and...MSRP: $459.99$367.95 -
Aero Precision M4E1 Complete Upper, 8" 5.56 Pistol Barrel w/ 7.3" Enhanced Gen 2 Handguard - FDE Cerakote
Aero Precision
MSRP: $605.00$525.95Aero Precision M4E1 Complete Upper, 8" 5.56 Pistol Barrel w/ 7.3" Enhanced Gen 2 Handguard - FDE Cerakote This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced milling...MSRP: $605.00$525.95 -
Aero Precision M4E1 Enhanced Complete Upper, 20" 6.5 Grendel SS Barrel, EM-15 Gen 2 HG - Anodized Black
Aero Precision
MSRP: $765.00$665.95Aero Precision M4E1 Enhanced Complete Upper, 20" 6.5 Grendel SS Barrel, EM-15 Gen 2 HG - Anodized Black Upgrade the performance of your AR15 build with this 6.5 Grendel Complete Upper Receiver. Designed to be a low recoil/high accuracy cartridge, the 6...MSRP: $765.00$665.95 -
Out of stock
Aero Precision M4E1 Enhanced No FA Complete Upper, 10.5" 5.56 Carbine, 9" Enhanced M-LOK - Anodized Black
Aero Precision
MSRP: $505.00$454.99Aero Precision M4E1 Enhanced No FA Complete Upper, 10.5" 5.56 Carbine, 9" Enhanced M-LOK - Anodized Black This complete upper receiver features the same tried-and-true construction and aesthetics as our M4E1 Enhanced Upper Receivers, without provisions...MSRP: $505.00$454.99 -
Out of stock
Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE Handguard
Aero Precision
MSRP: $505.00$432.95Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver w/ 9" M-LOK ATLAS S-ONE Handguard This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $505.00$432.95 -
Out of stock
Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver with 9" M-LOK ATLAS R-ONE Handguard - Cerakote FDE
Aero Precision
MSRP: $540.00$499.95Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver with 9" M-LOK ATLAS R-ONE Handguard - Cerakote FDE This complete upper includes Aero Precision;s new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and...MSRP: $540.00$499.95 -
Out of stock
Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE
Aero Precision
MSRP: $505.00$454.99Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper Assembly - 9" M-LOK ATLAS R-ONE Aero Precision is an undeniable powerhouse in the AR-15 world, and that legacy continues with the new M4E1-T ATLAS R-One Complete Upper Receivers. Lightweight but...MSRP: $505.00$454.99 -
Aero Precision M4E1 Threaded 16" .223 Wylde Fluted Complete Upper Receiver with ATLAS R-ONE Handguard - Anodized Black
Aero Precision
MSRP: $730.00$631.95Aero Precision M4E1 Threaded 16" .223 Wylde Fluted Complete Upper Receiver with ATLAS R-ONE Handguard - Anodized Black This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight...MSRP: $730.00$631.95 -
Aero Precision M4E1 Threaded 20" .350 Legend Carbine Length Complete Upper w/ 16.6" ATLAS R-ONE Handguard - Anodized Black
Aero Precision
MSRP: $750.00$641.95Aero Precision M4E1 Threaded 20" .350 Legend Carbine Length Complete Upper w/ 16.6" ATLAS R-ONE Handguard - Anodized Black This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in...MSRP: $750.00$641.95 -
Aero Precision M4E1 Threaded 20" .350 Legend Carbine Length Complete Upper w/ 16.6" ATLAS R-ONE Handguard - FDE Cerakote
Aero Precision
MSRP: $790.00$674.95Aero Precision M4E1 Threaded 20" .350 Legend Carbine Length Complete Upper w/ 16.6" ATLAS R-ONE Handguard - FDE Cerakote The Aero Precision M4E1-T 20in Complete Upper was developed to be the ideal item for any person needing a top quality selection...MSRP: $790.00$674.95 -
Aero Precision M4E1 Threaded Barreled Upper 5.56 Carbine Length ATLAS R-One - 16"
Aero Precision
MSRP: $645.00$559.95Aero Precision M4E1 Threaded Barreled Upper 5.56 Carbine Length ATLAS R-One - 16" This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS R-ONE M-LOK handguard. This barreled upper...MSRP: $645.00$559.95 -
Out of stock
Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS R-ONE - 14.5"
Aero Precision
MSRP: $640.00$546.95Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS R-ONE - 14.5" This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 14.5” 5.56 barrel and the ATLAS R-ONE M-LOK handguard. This barreled...MSRP: $640.00$546.95 -
Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS R-ONE - 14.5" - FDE
Aero Precision
MSRP: $680.00$588.95Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS R-ONE - 14.5" - FDE This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of...MSRP: $680.00$588.95 -
Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS S-ONE - 14.5"
Aero Precision
MSRP: $640.00$554.95Aero Precision M4E1 Threaded Barreled Upper Receiver 5.56 Mid-Length - ATLAS S-ONE - 14.5" This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 14.5” 5.56 barrel and the ATLAS S-ONE M-LOK handguard. This barreled...MSRP: $640.00$554.95 -
Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - Anodized
Aero Precision
MSRP: $615.00$535.95Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - Anodized Explore the capabilities of the Aero Precision M4E1 Threaded Complete Upper, designed for shooters who prioritize compact...MSRP: $615.00$535.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - FDE Cerakote
Aero Precision
MSRP: $655.00$569.95Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - FDE Cerakote This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while...MSRP: $655.00$569.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper 12.5" 5.56 BRL 12" M-LOK AR15 ATLAS S-ONE HG - Anodized Black
Aero Precision
MSRP: $412.24$380.95Aero Precision M4E1 Threaded Complete Upper 12.5" 5.56 BRL 12" M-LOK AR15 ATLAS S-ONE HG - Anodized Black This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $412.24$380.95 -
Aero Precision M4E1 Threaded Complete Upper 16" 5.56 Mid Pencil Length Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized
Aero Precision
MSRP: $660.00$573.95Aero Precision M4E1 Threaded Complete Upper 16" 5.56 Mid Pencil Length Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized This complete upper includes Aero Precision’s new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in...MSRP: $660.00$573.95 -
Aero Precision M4E1 Threaded Complete Upper 18" 5.56 Rifle Length Barrel ATLAS R-ONE 15" M-LOK HG Anodized
Aero Precision
MSRP: $665.00$578.95Aero Precision M4E1 Threaded Complete Upper 18" 5.56 Rifle Length Barrel ATLAS R-ONE 15" M-LOK HG Anodized Introducing the Aero Precision M4E1 Threaded Complete Upper, a premium choice for enthusiasts seeking advanced...MSRP: $665.00$578.95 -
Aero Precision M4E1 Threaded Complete Upper 7.5" 5.56 Barrel ATLAS R-ONE 7" M-LOK HG - Anodized
Aero Precision
MSRP: $424.99$419.95Aero Precision M4E1 Threaded Complete Upper 7.5" 5.56 Barrel ATLAS R-ONE 7" M-LOK HG - Anodized This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of...MSRP: $424.99$419.95 -
Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - FDE Cerakote
Aero Precision
MSRP: $650.00$599.95Aero Precision M4E1 Threaded Complete Upper, 11.5" 5.56 Barrel, 10.3" ATLAS R-ONE M-LOK HG - FDE Cerakote This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $650.00$599.95 -
Aero Precision M4E1 Threaded Complete Upper, 12.5" 5.56 Carbine Length Barrel w/ 10.3" ATLAS R-ONE M-LOK HG - Anodized Black
Aero Precision
MSRP: $615.00$535.95Aero Precision M4E1 Threaded Complete Upper, 12.5" 5.56 Carbine Length Barrel w/ 10.3" ATLAS R-ONE M-LOK HG - Anodized Black This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind,...MSRP: $615.00$535.95 -
Aero Precision M4E1 Threaded Complete Upper, 12.5" 5.56 Carbine Length Barrel w/ 10.3" ATLAS S-ONE M-LOK HG - Anodized Black
Aero Precision
MSRP: $615.00$535.95Aero Precision M4E1 Threaded Complete Upper, 12.5" 5.56 Carbine Length Barrel w/ 10.3" ATLAS S-ONE M-LOK HG - Anodized Black This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind,...MSRP: $615.00$535.95 -
Aero Precision M4E1 Threaded Complete Upper, 16" .300 Blackout Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized
Aero Precision
MSRP: $660.00$573.95Aero Precision M4E1 Threaded Complete Upper, 16" .300 Blackout Barrel, ATLAS R-ONE 15" M-LOK HG - Anodized The Aero Precision AR-15 barreled upper receiver is built around the M4E1 Threaded upper receiver designed for use with standard barrel nut setups...MSRP: $660.00$573.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid Pencil Length Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black
Aero Precision
MSRP: $660.00$565.95Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid Pencil Length Barrel, 15" M-LOK ATLAS S-ONE Handguard - Anodized Black Protect your hands and rails from your muzzle with this Aero Precision M4E1 Threaded 5.56 Mid Pencil Barrel w/ ATLAS S-ONE...MSRP: $660.00$565.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel w/ 15" ATLAS R-ONE M-LOK Handguard - FDE
Aero Precision
MSRP: $695.00$602.95Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel w/ 15" ATLAS R-ONE M-LOK Handguard - FDE This complete upper includes Aero's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still...MSRP: $695.00$602.95 -
Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel, ATLAS R-ONE 15" M-LOK HG
Aero Precision
MSRP: $655.00$569.95Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel, ATLAS R-ONE 15" M-LOK HG This Aero Precision M4E1 Threaded AR-15 upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS R-ONE M-LOK handguard...MSRP: $655.00$569.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel, ATLAS R-ONE 15" M-LOK HG - Kodiak Brown
Aero Precision
MSRP: $655.00$560.95Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel, ATLAS R-ONE 15" M-LOK HG - Kodiak Brown This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still...MSRP: $655.00$560.95 -
Aero Precision M4E1 Threaded Complete Upper, 7.5" 5.56 Barrel, 7" M-LOK ATLAS S-ONE Handguard - Anodized Black
Aero Precision
MSRP: $424.99$343.95Aero Precision M4E1 Threaded Complete Upper, 7.5" 5.56 Barrel, 7" M-LOK ATLAS S-ONE Handguard - Anodized Black This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing...MSRP: $424.99$343.95 -
Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS R-ONE Handguard - Anodized Black
Aero Precision
MSRP: $565.00$491.95Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS R-ONE Handguard - Anodized Black This complete upper includes our ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing...MSRP: $565.00$491.95 -
Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS R-ONE Handguard - FDE Cerakote
Aero Precision
MSRP: $605.00$525.95M4E1 THREADED COMPLETE UPPER, 8" 5.56 BARREL, 7.3" M-LOK ATLAS R-ONE HANDGUARD - FDE CERAKOTE Specifications: Made In America?: Yes Platform: AR15 Series: ATLAS Caliber: 5.56 NATO Barrel Length: 8" Finish: Magpul FDE CerakoteMSRP: $605.00$525.95 -
Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS S-ONE Handguard - Anodized Black
Aero Precision
MSRP: $565.00$491.95Aero Precision M4E1 Threaded Complete Upper, 8" 5.56 Barrel, 7.3" M-LOK ATLAS S-ONE Handguard - Anodized Black This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $565.00$491.95 -
Aero Precision M4E1 Threaded PRO 12.5" CHF 5.56 M-LOK Midlength Complete Upper
Aero Precision
MSRP: $1,095.00$950.95Aero Precision M4E1 Threaded PRO 12.5" CHF 5.56 M-LOK Midlength Complete Upper The PRO Upper Receiver Group built around our PRO 5.56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard, BREACH Charging Handle,...MSRP: $1,095.00$950.95 -
Aero Precision M4E1 Threaded PRO 16.3" CHF 5.56 M-LOK Midlength Complete Upper
Aero Precision
MSRP: $1,145.00$993.95Aero Precision M4E1 Threaded PRO 16.3" CHF 5.56 M-LOK Midlength Complete Upper The PRO Upper Receiver Group built around our PRO 5.56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard, BREACH Charging Handle,...MSRP: $1,145.00$993.95 -
Out of stock
Aero Precision M4E1-T 16" 5.56 Carbine Complete Upper w/ 15? M-LOK ATLAS S-ONE Handguard
Aero Precision
MSRP: $645.00$550.95Aero Precision M4E1-T 16" 5.56 Carbine Complete Upper w/ 15? M-LOK ATLAS S-ONE Handguard The Aero Precision M4E1 Threaded AR-15 Barreled Upper Receiver is perfect for shooters who are looking for a little more out of their build. The unique receiver...MSRP: $645.00$550.95 -
Out of stock
Aero Precision M4E1-T 16" 5.56 Midlength R-ONE Complete Upper - ODG Anodized
Aero Precision
MSRP: $655.00$569.95Aero Precision M4E1-T 16" 5.56 Midlength R-ONE Complete Upper - ODG Anodized This complete upper includes Aero Precision's new ATLAS R-ONE Handguard on their billet-style threaded M4E1 upper. R-ONE handguards are designed with size and weight in mind,...MSRP: $655.00$569.95 -
Aero Precision M4E1-T 18" .223 Wylde Rifle Complete Upper w/ 15" M-LOK ATLAS S-ONE Handguard
Aero Precision
MSRP: $700.00$607.95Aero Precision M4E1-T 18" .223 Wylde Rifle Complete Upper w/ 15" M-LOK ATLAS S-ONE Handguard This complete upper includes our ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition...MSRP: $700.00$607.95 -
Aero Precision M4E1-T Complete Upper, 16" .223 Wylde Fluted SS Barrel, 15" M-LOK ATLAS S-ONE HG - Anodized
Aero Precision
MSRP: $730.00$631.95Aero Precision M4E1-T Complete Upper, 16" .223 Wylde Fluted SS Barrel, 15" M-LOK ATLAS S-ONE HG - Anodized This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $730.00$631.95