AR-15 80% Lower Receiver Build Kit – Raw Aluminum with Fire / Safe Markings ^

AR-15 80% Lower Receiver Build Kit – Complete LPK with M4 Stock Kit

Build your custom AR-15 with our AR-15 80% Lower Receiver Build Kit, featuring an unfinished 80% lower and premium components to complete your lower receiver assembly. This kit includes a Bare Necessities Complete LPK, a Tactical Sport Mil-Spec M4 Stock, and a 6-position adjustable buffer tube assembly, providing the essential parts for your build. Perfect for DIY builders looking for a more hands-on approach, this kit allows you to personalize your AR while maintaining full control over the final machining and finishing.

The 80% lower receiver is precisely machined from 7075-T6 aluminum, delivering superior strength and durability. It comes unfinished, allowing you to complete the final milling operations according to your specifications. With its mil-spec compatibility, this lower is designed for a seamless fit with standard AR-15 components.

Key Features:

• Lower Receiver: 80% forged 7075-T6 aluminum lower, unfinished, allowing for full customization and compliance with applicable regulations.
• Stock Kit: Tactical Sport Mil-Spec M4 Stock Kit with a 6-position adjustable buffer tube assembly for optimal comfort and adaptability.
• Lower Parts Kit: Bare Necessities Complete LPK, including all essential components such as the selector, trigger, hammer, pins, springs, and an A2 pistol grip. Some kits may include a standard or oversized trigger guard based on availability.
• Durability: Built for rugged performance, with quality materials ensuring reliability in various shooting applications.

Important: This 80% lower receiver is not considered a firearm and does not require an FFL for purchase. However, additional machining is required to make it functional. Ensure compliance with federal, state, and local laws before completing your build.

This kit is the perfect foundation for builders who want more control over their AR-15 project. Get yours today and start crafting your personalized rifle!

RTB is now offering raw 80% lower receivers pre-engraved with whatever serial number and manufacturer information you want. We typically engrave to a depth of .01" and you will need to fill out the following information in the text boxes above:

You can have any of the 5 lines below engraved. Pick and choose if you like, but we recommend using all of them. We recommend using all capital letters, but we will engrave exactly what you type.

1. Name of Person or Entity (This can be your personal name, trust name, etc.)

2. City & State

3. Model (This can be whatever you want) **DEFAULT PREFIX = "MOD:"

4. Caliber ("MULTI" is a good choice but you can choose whatever caliber you want) **DEFAULT PREFIX = "CAL:"

5. Serial Number (This should be unique and should not match any of the serial numbers that you currently own or have manufactured. If you add the same lower multiple times, we will continue the serial number sequence for you.). **DEFAULT PREFIX = "S/N:"

***YOU MUST SPECIFICALLY REQUEST IN THE "ORDER COMMENTS" SECTION THAT WE ARE NOT TO ENGRAVE THE DEFAULT PREFIXES IF YOU DO NOT WANT THEM.***

Please note: We will not ship 80% blanks to the following states: NY, NJ, D.C., CT, HI, CA, MD, WA, DE, NV, IL and RI. This is not legal advice, and we encourage you to check your local and state laws prior to ordering.

Please note: Some states may not allow you to legally manufacture a firearm. Please be sure to do your due diligence and make sure you are following your state and local laws before attempting to manufacture a firearm. This is not intended and should not be construed as an advertisement or offer for sale of any of our products to New Jersey residents or any person in New Jersey.

Please add multiple lowers to the cart for unique serial numbers. If you add the same lower multiple times, we will continue the serial number sequence for you.