Sale

AR-15 5.56 Nato 10.5″ Pistol Upper Complete Build Kits (Unassembled Black Barrel Upper) – Black

Shooters Gate
SKU:
AR-BDKT-U556-10.57SC-M10-BLK
$495.99 $251.19
(3 reviews)
Weight:
6.00 LBS
Current Stock:
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Builders Tried Everything. This One Worked.

AR Build Kit Review

“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
AR Build Kit Review

“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
AR Build Kit Review

“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
AR Build Kit Review

“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
AR Build Kit Review

“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
AR Build Kit Review

“This works great. Seems to be good quality and all of the pieces fit perfectly.”

★★★★★
Brian K. Verified Builder
AR Build Kit Review

“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
AR Build Kit Review

“Great kit — first time building an AR-15. Went together easy and shoots good.”

★★★★★
Steven C. Verified Builder
AR Build Kit Review

“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
AR Build Kit Review

“Great rifle at a great price. Shipped extremely fast and no problems assembling.”

★★★★★
Anthony P. Verified Builder
AR Build Kit Review

“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” 5.56 NATO Uppers

Choosing between a 7.5”, 10.5”, or 16” 5.56 NATO upper depends on how you balance size and performance. The 10.5 inch barrel is widely considered the most versatile option for pistol builds, offering improved reliability and velocity over ultra-short setups while remaining compact.

Barrel Length Best Use Advantages Considerations
7.5” Ultra-compact pistol builds Shortest overall length, extremely maneuverable Reduced velocity, increased muzzle blast and flash
10.5” Balanced pistol configuration Better reliability and velocity than 7.5”, proven all-around performance Slightly longer than ultra-short setups
16” Rifle-length builds Highest velocity, improved effective range and control Not suitable for pistol configurations

Key Features

Upper Receiver Black Forged 7075-T6 Mil-Spec Stripped upper receiver
Barrel 10.5" 5.56 Nato barrel
Dust Cover & Forward Assist Black or Matched-color dust cover
Black or Matched-color forward assist
Gas System Gas Block (diameter varies depending on the barrel)
Gas Tube (length varies depending on the barrel)
Muzzle Device A2 Bird Cage Flash Hider with crush washer (Our Round Muzzle Brake will be attached to uppers going to California to comply with local laws).
Muzzle device will be parkerized or stainless steel (it will match the barrel material).
Handguard Black or Matched-color M-LOK Free Float Handguard
For 10.5" Uppers there will be a 10" handguard
Bolt Carrier Group & Charging Handle Full-auto bolt carrier group, made in the USA
Black standard charging handle
Twist Ratios 5.56 Nato Barrels are 1:7 Twist

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

A fully unassembled Upper with the following components:
Black Forged 7075-T6 Mil-Spec Stripped upper receiver
10.5" 5.56 Nato barrel
Black or Matched-color dust cover
Black or Matched-color forward assist
Gas Block (diameter varies depending on the barrel)
Gas Tube (length varies depending on the barrel)
A2 Bird Cage Flash Hider with crush washer (Our Round Muzzle Brake will be attached to uppers going to California to comply with local laws).
Muzzle device will be parkerized or stainless steel (it will match the barrel material).
Black or Matched-color M-LOK Free Float Handguard (For 10.5" Uppers there will be a 10" handguard)
Full-auto bolt carrier group, made in the USA
Black standard charging handle
Black lower parts kit
Black Pistol Tube
Black castle nut
Black end plate 
Black Pistol Tube Foam
Buffer Spring
Buffer

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!

FAQ

Is a 10.5 inch barrel good for 5.56 NATO?
Yes. A 10.5” barrel is widely regarded as one of the most practical lengths for 5.56 NATO pistol builds. It offers improved reliability and usable velocity compared to ultra-short barrels, while remaining compact and maneuverable.
Why choose a 10.5” upper instead of 7.5” or 16”?
A 10.5” upper provides a balanced middle ground. It is more compact than a 16” rifle setup, while delivering better performance and shootability than a 7.5” configuration.
Is this upper fully assembled?
No. This is an unassembled upper build kit. It is intended for builders who prefer hands-on assembly and customization. Professional assembly is recommended.
Is this upper compatible with AR pistol builds?
Yes. A 10.5” 5.56 NATO upper is commonly used in AR pistol configurations. Final compatibility depends on your lower receiver and overall setup.
What should I expect from a 10.5” 5.56 setup?
A 10.5” setup offers a balance of compact size and controllable performance. Users should expect more blast than a 16” barrel, but noticeably improved handling and reliability compared to ultra-short builds.

Reviews

  • 5
    Great kit.

    Posted by Vince on Jan 4th 2026

    Just received, looks great as pictured. Will order from again.

  • 5
    as advertised

    Posted by Perkins on Jan 4th 2026

    Fit and finish were excellent, shoots great!!

  • 5
    Good

    Posted by Patrick on Jan 4th 2026

    Awesome site.Received everything as described.