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AR-15 5.56 Nato 16" Rifle Upper Complete Build Kits (Unassembled Black Barrel Upper) -BLK

Name: AR-15 5.56 Nato 16" Rifle Upper Complete Build Kits (Unassembled Black Barrel Upper) -BLK
Brand: Shooters Gate
SKU: AR-BDKT-U556-167HC-M15-BLK-1
Price: 259.19 USD
Availability: InStock
Rating: 5 (26 reviews)

Shooters Gate

SKU:

AR-BDKT-U556-167HC-M15-BLK-1

$479.99 $259.19

(26 reviews)

Weight:

7.00 LBS

Current Stock:

Quantity:

Adding to cart… The item has been added

- OVERVIEW -

The Shooters Gate AR-15 Unassembled Rifle Build Kit provides a solid Mil-Spec foundation for a dependable 5.56 NATO build. It includes a forged 7075-T6 upper receiver, a 16" 5.56 barrel with a 1:8 twist and mid-length gas system, and a 15" free-float M-LOK handguard for stability and accessory mounting.

The kit also features a USA-made BCG, standard charging handle, complete lower parts kit, and a Mil-Spec buffer tube assembly. Bonus tools—an armorer’s wrench, gun mat, and sling—are included to support assembly. Only a stripped lower receiver and magazine are required to complete the build.

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Upper

Lower

Buffer

Bonus

Complete Upper Assembly Components

Receiver: Forged 7075-T6 Mil-Spec Upper

Barrel: 16" 5.56 NATO, 1:8 Twist

Handguard: 15" M-LOK Free-Float

BCG: USA-Made Bolt Carrier Group

Gas: .750 Gas Block + Mid-Length Tube

Muzzle: A2 Flash Hider

Charging Handle

dust cover Black

forward assist Black

Trigger Parts Kit

Safety Selector Safety Detent Safety Detent Spring Trigger Guard Trigger Guard Roll Pin Pistol Grip Washer Pistol Grip Screw Buffer Retainer Retaining Spring Mag Release Mag Release Button Mag Release Spring Takedown Pins (x2) Takedown Springs (x2) Takedown Detents (x2) Hammer Spring Hammer Pin Trigger Spring Trigger Pin Bolt Catch Bolt Catch Plunger Bolt Catch Spring Bolt Catch Roll Pin Disconnector Disconnector Spring Trigger Guard Screws Trigger Hammer AR-15 Pistol Grip

Buffer System & Furniture

Mil-Spec Stock

Mil-Spec Buffer Tube

Carbine Buffer & Spring

Castle Nut + End Plate

Bonus Gear

Armorer’s Wrench

Gun Mat

One-Point Sling

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

Key Features

Forged 7075-T6 Upper	Mil-Spec stripped upper receiver (black)
16" 5.56 NATO Barrel	1:8 twist, mid-length gas (optimized for 55–77 gr)
15" Free-float Handguard	M-LOK compatible for accessories and rails
USA-Made BCG	Bolt carrier group manufactured in the USA
Complete Lower Parts Kit	Trigger, pins, springs, hammer — ready to install
Mil-Spec Buffer Tube & Spring	Carbine buffer and spring included
Bonus Gear Included	Armorer’s wrench, gun mat, one-point sling (all free)

What You Still Need to Complete the Build

Stripped Lower Receiver	An AR-15 Stripped Lower Receiver (transfer requires FFL & background check as governed by local law)
Magazine	A magazine appropriate for your selected caliber

Package Contents

●	Upper Receiver (forged 7075-T6, black, Mil-Spec, stripped) × 1
●	Barrel — 16" 5.56 NATO × 1
●	Dust Cover (black) × 1
●	Forward Assist (black) × 1
●	Gas Block — .750" × 1
●	Gas Tube — mid-length × 1
●	Muzzle Device — A2 birdcage flash hider with crush washer × 1
●	Handguard — 15" black M-LOK free-float × 1
●	Bolt Carrier Group (Made in USA) × 1
●	Charging Handle (black standard) × 1
●	Lower Parts Kit (trigger, pins, springs, hammer, etc.) × 1
●	Buffer Tube — black Mil-Spec (commercial set available on request) × 1
●	Castle Nut (black) × 1
●	End Plate — black Mil-Spec × 1
●	Stock — black Mil-Spec with built-in sling adapter (commercial set available on request) × 1
●	Buffer Spring (standard carbine) × 1
●	Buffer — carbine buffer × 1
●	Extra Ambi End Plate (left/right sling options) × 1
●	Armorers Wrench × 1
●	Gun Mat (protective assembly/cleaning mat) × 1
●	One-Point Sling (adjustable) × 1

Model: AR-15 Unassembled Rifle Build Kit

Shooters Gate proudly offers this AR-15 Unassembled Rifle Build Kit — it contains nearly all components required to assemble a functioning AR-15 upper and the common lower parts needed for installation.

Complete upper assembly components

USA-made bolt carrier group

5.56 NATO — 1:8 twist (mid-length gas)

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.

SKU: AR-UBK-16-556

Availability: In stock

FAQ

Is this kit legal in my state?

Please verify compliance with your local and state regulations before purchasing.

What do I still need to complete the build?

You will need a compatible AR-15 stripped lower receiver and a magazine. All other major components are included in the kit.

Is this kit suitable for first-time builders?

Yes. A bonus AR-15 gun mat and armorer’s wrench are included to help with assembly, and our ShootersGate experts are available to assist if needed.

Do you offer warranty or support?

Yes. With over 20 years of industry experience, ShootersGate provides reliable, long-term support. Our VA-based team is available to help with product questions, compatibility concerns, and general build assistance.

Reviews

5
Perfect

Posted by Carmine on Dec 3rd 2025

Excellent kit grate price
5
Great

Posted by John on Dec 2nd 2025

Super fast shipping.
5
Great kit

Posted by DAVID on Dec 2nd 2025

I have put several of these kits together. They seem like really good kits for the lowest prices anywhere. If you have any problems, customer service is second to none.
5
love it

Posted by Homan on Dec 1st 2025

I bought this kit about one years ago and love the rifle, I have built 5 more rifles in different kits and have had no issues out of any of them. The quality of the parts are great and cant beat the price.
5
Good

Posted by Jonathan on Dec 1st 2025

Fair price, lower quality, misleading advertisement, I would buy agian.
5
Perfect

Posted by Kim Sackmann on Nov 26th 2025

Parts as advertised. Excellent shipping & handling, arrived ahead of schedule. Customer Service was fast and professional.
5
Great build kit

Posted by Garret on Nov 26th 2025

Great kit went together easy I will be buying more.
5
Build kit

Posted by Ron on Nov 25th 2025

I purchased a week ago 16 full length good quality I am so happy best deal so far I am highly recommend this build kit totally worth it and they customers service is 100% legit I meet than from Chantilly gun show stuff are great people mark is a great guy