AR-15 300 Blackout 16" Rifle Build Kit (Unassembled) - Black
Sale

AR-15 300 Blackout 16" Rifle Build Kit (Unassembled) - Black

Shooters Gate
SKU:
AR-BDKT-U300-16P8HP-M15-BLK
$475.99 $259.19
(11 reviews)
Weight:
7.00 LBS
Current Stock:
193
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Description

Key Features

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

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
● 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

Model: AR-15 Unassembled Rifle Build Kit

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!

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
    Really fast shipping.

    Posted by Chris on Mar 24th 2026

    Really nice end product.

  • 5
    Nice

    Posted by Dave on Mar 24th 2026

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

  • 5
    Good Value for the Price

    Posted by Chris T. on Mar 16th 2026

    Got the AR-15 300 Blackout 16" kit and it feels like a really good value for the price. Looks solid, priced right, and overall I’m happy with it.

  • 5
    Just Got It Today

    Posted by Tyler S. on Mar 16th 2026

    Just got my AR-15 300 Blackout 16" Rifle Upper Complete Build Kit today and everything looks really good out of the box. The finish looks clean, parts were packed well, and so far I’m impressed. Haven’t put it together yet, but I’m definitely looking forward to the build this weekend.

  • 5
    Going to be a fun build

    Posted by Doug Hazzard on Feb 15th 2026

    Great quality

  • 5
    Easy build, no issues

    Posted by Jason on Jan 20th 2026

    Clean finish, no missing parts, and fast shipping. Very happy with this build kit.

  • 5
    Great value

    Posted by Michael on Jan 20th 2026

    Parts fit well, finish looks clean, and everything assembled without issues. Shipping was fast and ShootersGate support was responsive. Would definitely buy again.

  • 5
    Perfect

    Posted by Chris on Jan 4th 2026

    I bought this kit back in October and I ran 500 rounds through it without a hiccup

  • 5
    Great

    Posted by Thomas on Jan 4th 2026

    Great shipping, great service these guys are fabulous. ordered my first build , and just ordered another for the wife, our son just ordered one.