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
    Perfect

    Posted by Matthew on Jan 4th 2026

    Great site. Exactly what I’m looking for.

  • 5
    Awesome price

    Posted by Rudy on Dec 17th 2025

    Great product and all parts very durable. Awesome price and highly recommended!