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M4e1 Assembled Upper Receiver .300 Blackout Black - M4e1 .300 Bo Assembl Uppr Rcvr M4 16'''' Bbl Pistol-Length Blk
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$499.99
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SKU: 100025514
Overview
Built for a custom AR pistol, SBR, or carbine setup, this assembled upper receiver gives builders a .300 Blackout foundation from Aero Precision with a black anodized finish. It is offered in 8", 10", and 16" barrel configurations, each paired with its matching handguard length, and uses a pistol-length gas system with a low-profile gas block. Because it does not include a charging handle or bolt carrier group, it leaves room for the user to choose those components to suit the rest of the build. For hunters and shooters putting together a tailored rifle, it offers a straightforward starting point without unnecessary extras.
Why Hunters Choose the Aero Precision
Chambered .300
Blackout for AR-15 pistol, SBR,
Black Anodized
Finish provides a clean, subdued
Available Three
Matched handguard options
Includes Pistol-length
Low-profile gas block
Does Not
Include charging handle or bolt
Key Features
- Aero Precision M4E1 assembled upper receiver chambered in .300 Blackout
- Black anodized finish
- Available in 8-inch, 10-inch, and 16-inch barrel lengths
- M-LOK EM-7 handguard options matched to barrel length
- Pistol-length gas system with low-profile gas block
- Does not include charging handle or bolt carrier group
Best Used For
- Custom AR pistol builders wanting a .300 Blackout upper with room to choose their own bolt carrier group and charging handle.
- SBR or carbine owners looking for an assembled upper in 8-, 10-, or 16-inch barrel options.
- Hunters planning a .300 Blackout build around a pistol-length gas system and low-profile gas block.
- Shooters who prefer an Aero Precision upper with black anodized finish and M-LOK EM-7 handguard options.
Specifications
| Available Lengths | 8 inch, 10 inch, 16 inch |
|---|---|
| Barrel | 8 inch, 10 inch, and 16 inch carbine length chrome moly barrel |
| Blade Finish | Black anodizing |
| Bolt Carrier Group Included | No |
| Chambering | .300 Blackout |
| Charging Handle Included | No |
| Gas Block | Low profile gas block |
| Gas System | Pistol length gas system |
| Handguard | M-LOK EM-7 7 inch for 8 inch barrel; 9 inch handguard for 10 inch barrel; 15 inch handguard for 16 inch barrel |
| Muzzle Device | Standard A2 flash hider |
Pros
- Chambered in .300 Blackout for AR-15 pistol, SBR, or carbine builds.
- Black anodized finish provides a clean, subdued appearance.
- Available in three lengths with matched handguard options.
- Includes a pistol-length gas system with low-profile gas block.
- Does not include charging handle or bolt carrier group, allowing customization.
Considerations & Trade-offs
- Does not include a charging handle or bolt carrier group, so those components must be selected separately for the build.
- Configured for .300 Blackout and offered in specific barrel/handguard length combinations, so fit and intended use depend on choosing the right variant.
- Built around a pistol-length gas system with a low-profile gas block, which is a specific setup to match rather than a universal upper configuration.
Suggested Comparisons
- AR-15 upper receiver assemblies
- .300 Blackout barrels and uppers
- M-LOK handguard upper builds
- AR pistol or SBR build components
Suggested Accessories
- Charging handle
- Bolt carrier group
- M-LOK accessories
- AR-15 magazine
Frequently Asked Questions
What comes included with this upper receiver assembly?
The description states that it does not come with the charging handle or bolt carrier group. It is an assembled upper receiver, but those two components are not included.
Is this upper chambered for .300 Blackout?
Yes. The long description says it is chambered in .300 Blackout.
What build types is this upper intended for?
The short description identifies it as an enhanced tactical upper for a custom AR pistol, SBR, or carbine build.
What finish does this upper have?
The long description says it is finished with black anodizing.
Are there different length options available?
Yes. The long description says it is available in three lengths, with matching handguard lengths: 8" barrel with 7" M-LOK EM-7 handguard, 10" barrel with 9" handguard, and 16" barrel with 15" handguard.