Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD Green
$569.99 at OpticsPlanet · 2 stores
In stock Sale
Comp FSB 5.56 Assembled Upper 16" M4 Bbl W/MOE SL Carb Handguard BLK
Aero Precision · Upper Receiver
No ratings yetBest price
$409.99at Brownells
Out of stock checked Oct 24, 2026
In stock now instead
- Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in … $569.99at OpticsPlanet
- Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Ass… $408.89at OpticsPlanet
- Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm … $418.19at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $409.99checked Oct 24, 2026 | Out of stock | Buy at Brownells | |
| OpticsPlanet | $409.99Salechecked Oct 23, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x7 twist M-LOK Free Float Handguard Black 11.5
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Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 20 Inch Barrel Standart Profile 1-9 Twist 1/2-28 Thread A2 Handguard A2 Flash Hider
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In stock
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $409.99 | $409.99 | $409.99 |
| OpticsPlanet | $409.99 | $409.99 | $409.99 |
Since Sep 28, 2026.
About this part
The Comp FSB 5.56 Assembled Upper 16" M4 Bbl W/MOE SL Carb Handguard BLK is an AR-15 complete upper receiver from Aero Precision. It's sold by 2 stores, all at $409.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 16" · Handguards
Specifications
- Manufacturer
- Aero Precision
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
AR15 Assembled Upper, 5.56 Nato Carbine Barrel W/Pinned Front sight base MOE SL or MOE SL ML Carbine Handguard - Black Available in 10.5" or 16" barrel. 10.5" Upper Features: Upper: Standard AR15 Upper Receiver Barrel: 10.5" 5.56 Carbine Barrel w/ Pinned FSB Handguard: Magpul(TM) MOE SLA(R) Carbine Handguard Gas System: Carbine Length Gas System Muzzle Device: Standard A2 Flash Hider 16" MOE SL Upper Features: Upper: Standard AR15 Upper Receiver Barrel: 16" 5.56 Carbine Barrel w/ Pinned FSB Handguard: Magpul(TM) MOE SLA(R) Carbine Handguard Gas System: Carbine Length Gas System Mfg: Aero Precision
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