Sale
AR-15 300 Blackout 7.5" Pistol Upper Complete Build Kits (Unassembled Black Barrel Upper) - Black
Shooters Gate
$455.99
$246.19
(8 reviews)
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Shooters Gate
AR-15 300 Blackout 7.5" Pistol Upper Complete Build Kits (Unassembled Black Barrel Upper) - Black
Builders Tried Everything. This One Worked.
“Ordered the kit and had it in two days. Built it using a ShootersGate lower — everything fit the way it should. Put about 200 rounds through it with zero malfunctions. Solid kit, no shortcuts taken. I’d recommend it without hesitation.”
★★★★★
Michael T.
Verified Builder
“This was my first build, and it went together pretty easily thanks to the step-by-step guidance provided on the ShootersGate website.”
★★★★★
James R.
Verified Builder
“Best value for the money. Easy to assemble and far better organized than many other kits I’ve worked with. Lightweight, nicely balanced, and feels great once everything is together.”
★★★★★
David L.
Verified Builder
“Bought this for my first AR build and have to say it’s a great kit for the price. I was honestly surprised by how good it looks and how smoothly everything went together. They even included some helpful extras — a sling, a gun mat, and an armorer’s wrench.”
★★★★★
Daniel S.
Verified Builder
“Overall, a really good experience. Shipping was fast and everything showed up as expected. I had a quick question for customer service and they were easy to deal with. I’d buy from ShootersGate again and would recommend them to friends.”
★★★★★
Mark W.
Verified Builder
“This works great. Seems to be good quality and all of the pieces fit perfectly.”
★★★★★
Brian K.
Verified Builder
“Great product. Fast shipping. Everything fit together with ease. Fired beautifully at the range. Very happy with my purchase. Price was extremely reasonable.”
★★★★★
Kevin M.
Verified Builder
“Great kit — first time building an AR-15. Went together easy and shoots good.”
★★★★★
Steven C.
Verified Builder
“This was my first kit, and assembly was very easy. Everything came neatly organized in separate bags, which made the process straightforward. I’d definitely recommend it to anyone considering one.”
★★★★★
Thomas J.
Verified Builder
“Great rifle at a great price. Shipped extremely fast and no problems assembling.”
★★★★★
Anthony P.
Verified Builder
“Everything was as described. Fit and finish was perfect. Easy to install.”
★★★★★
Verdell M.
Verified Builder
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7.5” vs 10.5” vs 16” .300 Blackout Uppers
Choosing between a 7.5”, 10.5”, or 16” .300 Blackout upper depends on your intended use. The 7.5 inch barrel prioritizes maximum compactness for pistol builds, while 10.5” offers a balance of performance and size, and 16” favors velocity and range.
| Barrel Length | Best Use | Advantages | Considerations |
|---|---|---|---|
| 7.5” | Ultra-compact pistol builds | Shortest overall length, extremely compact, ideal for close-quarters setups | Reduced velocity, increased muzzle blast and noise |
| 10.5” | Balanced pistol configuration | Reliable cycling, better velocity than 7.5”, still compact | Slightly longer overall length |
| 16” | Rifle-length setups | Higher velocity, improved effective range, softer recoil impulse | Not suitable for pistol builds, longer and less maneuverable |
Key Features
| Forged 7075-T6 Upper | Black forged 7075-T6 Mil-Spec stripped upper receiver |
| 7.5" 300 Blackout Barrel | 7.5" 300 Blackout barrel (pistol gas) |
| Pistol Gas System | Gas block .750 and pistol gas tube (300 Blackout barrels are 1:8 twist, pistol gas system) |
| M-LOK Free Float Handguard | Black M-LOK free float handguard (7" handguard for 7.5" uppers) |
| USA-Made BCG & Charging Handle | Bolt carrier group made in the USA and black standard charging handle |
| Lower Receiver Components | Black lower parts kit, black pistol tube with foam, buffer spring, buffer, castle nut, end plate, extra ambi end plate |
| Bonus Tools & Gear | Armor wrench, gun mat, one point sling |
What You Still Need to Complete the Build
| Stripped Lower Receiver | You will still need an AR-15 Stripped Lower Receiver (FFL & Background Check required). |
| Magazine | You will also need a magazine that is suitable for your desired caliber. |
Package Contents
| ● | Black forged 7075-T6 Mil-Spec stripped upper receiver × 1 |
| ● | 7.5" 300 Blackout barrel × 1 |
| ● | Black dust cover × 1 |
| ● | Black forward assist × 1 |
| ● | Gas block .750 × 1 |
| ● | Pistol gas tube × 1 |
| ● | A2 bird cage flash hider with crush washer × 1 |
| ● | Black M-LOK free float handguard (7" handguard for 7.5" uppers) × 1 |
| ● | Bolt carrier group, made in the USA × 1 |
| ● | Black standard charging handle × 1 |
| ● | Black lower parts kit × 1 |
| ● | Black pistol tube × 1 |
| ● | Black pistol tube foam × 1 |
| ● | Black castle nut × 1 |
| ● | Black end plate × 1 |
| ● | Extra ambi end plate × 1 |
| ● | Buffer spring × 1 |
| ● | Buffer × 1 |
| ● | Armor wrench × 1 |
| ● | Gun mat × 1 |
| ● | One point sling × 1 |
Model: AR-15 Unassembled Pistol Build Kit
Shooters Gate is now proud to offer the AR-15 Unassembled Pistol Build Kit. With this build kit, you will be able to have almost all of the necessary components to build your very own AR-15 Pistol.
Fully unassembled upper with all listed components
Bolt carrier group, made in the USA
300 Blackout barrels are 1:8 twist, pistol gas system
WARNING:
WARNING: This product can expose you to chemicals such as lead and other petroleum products which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information visit https://www.p65warnings.ca.gov.
Note: Firearm laws and transfer requirements vary by state and locality. It is the buyer's responsibility to ensure compliance with all federal, state and local laws when purchasing and assembling firearm components.
FAQ
Is a 7.5 inch barrel good for .300 Blackout?
Yes. .300 Blackout was designed to perform well in short barrels. A 7.5” barrel prioritizes compactness and maneuverability, making it a popular choice for ultra-short pistol builds and close-range setups.
Why choose a 7.5” upper instead of 10.5” or 16”?
A 7.5” upper offers the shortest overall length and maximum compactness. Compared to 10.5” and 16” options, it is easier to handle in tight spaces, though it trades off some velocity and increased muzzle blast.
Is this upper fully assembled?
No. This is an unassembled upper build kit. It is intended for builders who want full control over assembly and component selection. Professional assembly is recommended.
Is this upper compatible with AR pistol builds?
Yes. A 7.5” .300 Blackout upper is commonly used for AR pistol configurations. Final compatibility depends on your lower receiver and overall build setup.
Can this .300 Blackout upper be used for suppressed builds?
.300 Blackout is frequently selected for suppressed use, especially in shorter barrel configurations. Suitability depends on your specific components and tuning. Always follow applicable laws and regulations.
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Sale
AR-15 300 Blackout 10.5" Pistol Upper Complete Build Kits (Unassembled Black Barrel Upper) - Black
$465.99 $251.19Shooters Gate
Reviews
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Perfect
Great site. Exactly what I’m looking for.
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easy installed
Very quick assembly and at the range the next day.
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easy installed
Very quick assembly and at the range the next day.
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Awesome
Awesome build. Great quality and reliable. Well made. Finish is great.
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Fast shipping
Received everything as described. Fast shipping within 2 days. Happy customer
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Great
I got a kit and put it together no problem. My buddies liked it so much they came and got a few kits from shootersgate as well. They all have nothing but good things to say about theirs too. One of the kits my buddy got even came with an adjustable gas block. How cool.
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Great build kit, great quality.
10/10 would highly consider this build kit for anyone new and experienced! It was simple and so much fun to assemble!
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Awesome
Awesome Solid Micro Buffer Tube! Easy install and make my micro AR even more compact! I'll be buying more! If you have any questions just call ,I talked to James about a micro AR upper and he was beyond helpful!