AR-15 300 Blackout 16″ Rifle Upper Complete Build Kits (Unassembled S.S Barrel Upper) – Black
Shooters Gate
“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.”
“This was my first build, and it went together pretty easily thanks to the step-by-step guidance provided on the ShootersGate website.”
“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.”
“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.”
“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.”
“This works great. Seems to be good quality and all of the pieces fit perfectly.”
“Great product. Fast shipping. Everything fit together with ease. Fired beautifully at the range. Very happy with my purchase. Price was extremely reasonable.”
“Great kit — first time building an AR-15. Went together easy and shoots good.”
“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.”
“Great rifle at a great price. Shipped extremely fast and no problems assembling.”
“Everything was as described. Fit and finish was perfect. Easy to install.”
Choosing between a 7.5”, 10.5”, or 16” .300 Blackout upper depends on your intended application. While shorter barrels prioritize compact pistol builds, the 16 inch barrel is designed for rifle-length setups emphasizing velocity, control, and extended range.
| Barrel Length | Best Use | Advantages | Considerations |
|---|---|---|---|
| 7.5” | Ultra-compact pistol builds | Extremely compact, ideal for close-quarters handling | Reduced velocity, louder muzzle blast |
| 10.5” | Balanced pistol configuration | Better velocity than 7.5”, still compact and maneuverable | Longer than ultra-short setups |
| 16” | Rifle-length builds | Highest velocity, improved accuracy potential, smoother recoil impulse | Longer overall length, less compact than pistol setups |
| Upper Receiver | Black Forged 7075-T6 Mil-Spec Stripped upper receiver |
| 16" 300 Blackout Barrel | 16'' 300 Blackout barrel |
| Dust Cover & Forward Assist | Black dust cover Black forward assist |
| Gas System | Gas Block.750 Carbine Gas Tube |
| Handguard | 15’’ Black M-LOK Free Float Handguard |
| BCG & Charging Handle | Bolt carrier group, made in the USA Black standard charging handle |
| Twist Ratios | 300 Blackout Barrels are 1:8 Twist, Carbine Gas System |
| 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. |
| ● | A fully unassembled Upper with the following components: |
| ● | Black Forged 7075-T6 Mil-Spec Stripped upper receiver |
| ● | 16'' 300 Blackout barrel |
| ● | Black dust cover |
| ● | Black forward assist |
| ● | Gas Block.750 |
| ● | Carbine Gas Tube |
| ● | A2 Bird Cage Flash Hider with crush washer. |
| ● | 15’’ Black M-LOK Free Float Handguard |
| ● | Bolt carrier group, made in the USA |
| ● | Black standard charging handle |
| ● | Black lower parts kit |
| ● | Black Mil-Spec Buffer Tube (Commercial set available on request) |
| ● | Black castle nut |
| ● | Black end plate with |
| ● | Black Mil-spec Stock with built in sling adapter (Commercial set available on request) |
| ● | Buffer Spring |
| ● | Buffer |
| ● | Extra Ambi end plate |
| ● | Armor Wrench |
| ● | Gun mat |
| ● | One point sling |
Shooters Gate is now proud to offer the AR-15 Unassembled Rifle 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 Rifle!
WARNING:
For more information go to https://www.p65warnings.ca.gov
I bought this kit back in October and I ran 500 rounds through it without a hiccup
Great shipping, great service these guys are fabulous. ordered my first build , and just ordered another for the wife, our son just ordered one.
Great site. Exactly what I’m looking for.
Great product and all parts very durable. Awesome price and highly recommended!