AR-15 5.56 Nato 16" Rifle Build Kit (Unassembled) -BLK
Sale

AR-15 5.56 Nato 16" Rifle Build Kit (Unassembled) -BLK

Shooters Gate
SKU:
AR-BDKT-U556-167HC-M15-BLK-1
$479.99 $259.19
(32 reviews)
Weight:
7.00 LBS
Current Stock:
177
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Description
- OVERVIEW -
The Shooters Gate AR-15 Unassembled Build Kit provides a solid Mil-Spec foundation for a dependable 5.56 NATO build. It includes a Stripped upper receiver, a 16“ 5.56 NATO barrel with a mid-length gas system (twist varies depending on the barrel), and a Black 15“ free-float M-LOK handguard for stability and accessory mounting.

The kit also features a Bolt Carrier Group, made in the USA, 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 Assembly

Upper Receiver
Stripped upper receiver
Barrel
16“ 5.56 NATO barrel
(twist varies depending on the barrel)
Dust Cover & Forward Assist
  • Black dust cover
  • Black 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
Handguard
Black M-LOK Free Float Handguard
For 16“ Uppers there will be a 15“ handguard
BCG & Charging Handle
  • Bolt Carrier Group, made in the USA
  • Black standard charging handle

Buffer System

Included Parts
Mil Spec Buffer Tube Buffer Spring Buffer Castle Nut End Plate

Lower Parts Kit

Included Parts
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

To Complete Your Build

What You Still Need
  • AR-15 Stripped Lower Receiver (FFL & Background Check required)
  • Magazine suitable for your desired caliber
⚠ 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 go to www.p65warnings.ca.gov

Reviews

  • 5
    16” Rifle Kit

    Posted by JW on Mar 17th 2026

    I really like this kit. So much that I immediately ordered a second one. Then I ordered the 7.5” pistol kit. So I ended up buying three kits in nine days. All arrived well packaged and super fast! Very happy with my purchase!

  • 5
    Feels Great in Hand

    Posted by Kyle M. on Mar 16th 2026

    Got this 16" kit in black and first impression was really good. Finish looks clean, parts feel nice in hand, and overall it just seems well put together.

  • 5
    easy to build

    Posted by Lee on Mar 15th 2026

    great easy to build kit, this was my first build and im excited to light her up

  • 5
    excellent

    Posted by Mopar on Mar 15th 2026

    Great kit! Everything fit together smoothly and the parts were very well made.

  • 5
    Nice

    Posted by Anthony on Mar 15th 2026

    Really nice end product. Really fast shipping. Loved the parts that came with the kit.

  • 4
    Ar15 upper and lower small parts kit.

    Posted by steven florer on Feb 8th 2026

    Going to jump right to the meat of the matter. Lower receiver small parts are mostly stamped and poorly I might add. But the stamp of made in Taiwan really f@($ me up. Upper is cool, hand guard is cool , barrel same. Everything went together well.. But this is a good throw away that can shoot. Works for me.

  • 4
    AR-15 5.56 Nato 16" Rifle Upper Complete Build Kits (Unassembled Black Barrel Upper) -BLK

    Posted by Garey on Jan 24th 2026

    KGreat kit at an unbeleivably low price. It's assembled now...some parts were a bit rough, but good lube took care of that. Now to see how it performs a the range. i docked a star because one of the parts was the wrong item and it held up my build. I'd buy this again.

  • 5
    Ar15 16inch kit

    Posted by Robert Greer on Jan 23rd 2026

    Awsome kit. Excellent parts and packaging Will be a repeat customer

  • 5
    Perfect

    Posted by Tim on Jan 4th 2026

    I bought this kit. I put 150 rounds through it so far without any issues. The quality of the upper is excellent. Overall I’d reccomend it.