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M4e1 Assembled Upper Receiver .300 Blackout Black - M4e1 .300 Bo Assembl Upper Rcvr M4 8'''' Bbl Pistol-Length Blk
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$534.99
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SKU: 100025512
Overview
Built for a custom AR pistol, SBR, or carbine setup, this assembled upper receiver gives hunters and shooters a .300 Blackout foundation from Aero Precision. It comes finished in black anodizing and is offered in multiple length configurations, with corresponding handguard options and barrel lengths. The pistol-length gas system and low-profile gas block are part of the setup, while the charging handle and bolt carrier group are left out so the builder can choose those components separately. For anyone assembling a tailored upper around a .300 Blackout platform, it offers a straightforward starting point without unnecessary extras.
Why Hunters Choose the Aero Precision
Chambered .300
Blackout for custom AR pistol,
Black Anodized
Finish provides a clean, subdued
Available Three
Barrel lengths to match different
Includes M-lok
EM-7 handguard options for accessory
Pistol-length Gas
Low-profile gas block included
Key Features
- Aero Precision M4E1 assembled upper receiver chambered in .300 Blackout.
- Black anodized finish for a clean, subdued appearance.
- Available in 8-inch, 10-inch, and 16-inch barrel lengths.
- Pistol-length gas system with low-profile gas block.
- M-LOK EM-7 handguard options matched to barrel length.
- Does not include charging handle or bolt carrier group.
Best Used For
- Custom AR pistol or SBR builders wanting a .300 Blackout upper with an 8-inch barrel option
- Hunters planning a compact .300 Blackout setup for short-range field use
- Shooters who want to choose their own charging handle and bolt carrier group
- Users building a carbine-length rifle with a factory-assembled upper receiver
Specifications
| Available Lengths | 8 in, 10 in, 16 in |
|---|---|
| Barrel Length | 8 in, 10 in, 16 in |
| Barrel Material | Chrome moly |
| 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 |
| Handguard Lengths | 7 in M-LOK EM-7 for 8 in barrel, 9 in handguard for 10 in barrel, 15 in handguard for 16 in barrel |
| Muzzle Device | Standard A2 flash hider |
Pros
- Chambered in .300 Blackout for custom AR pistol, SBR, or carbine builds
- Black anodized finish provides a clean, subdued appearance
- Available in three barrel lengths to match different build needs
- Includes M-LOK EM-7 handguard options for accessory mounting
- Pistol-length gas system with low-profile gas block included
- Sold as an assembled upper, simplifying the build process
Considerations & Trade-offs
- Does not include a charging handle or bolt carrier group, so those components must be selected separately.
- Configured for a custom AR pistol, SBR, or carbine build, so compatibility depends on the rest of the build components you choose.
- Available in multiple barrel and handguard lengths, which means the exact setup should be matched to your intended use before purchase.
- Black anodized finish is part of the package, but the listing does not provide additional finish or material details beyond that.
Suggested Comparisons
- AR-15 upper receivers
- .300 Blackout barrels
- AR pistol/SBR build components
- Handguards and gas system parts
Suggested Accessories
- Charging handle
- Bolt carrier group
- Magazines
- Optic mount
Frequently Asked Questions
Is this upper chambered for .300 Blackout only?
Yes. The product data identifies it as chambered in 300 Blackout.
Does this assembled upper include a bolt carrier group or charging handle?
No. The long description states that it does not come with the charging handle or bolt carrier group.
What barrel and handguard options are listed for this upper?
The product data lists 8", 10", and 16" barrel options, with corresponding handguards: M-LOK EM-7 7" for the 8" barrel, 9" handguard for the 10" barrel, and 15" handguard for the 16" barrel.
What gas system is specified?
The long description specifies a pistol length gas system with a low profile gas block.
What finish is mentioned for the upper receiver?
The upper is described as finished with black anodizing.