AT3 AT-15 Stripped Lower Kit - Burnt Bronze - w/ Midwest Lower Block
or 4 interest-free payments of $40.49 with
This item is regulated, therefore your entire order will be shipped to an FFL dealer of your choosing. After you place your order, we will contact you to finalize these details.
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- Backed by 2 brand warranties what it covers
Product description
Stripped AT-15 Lower Paired with a Midwest Industries Lower Receiver Block for Assembly
Features
- AT3 AT-15 stripped lower receiver forged from 7075-T6 aluminum, finished in Burnt Bronze
- Deeper magwell flare than mil-spec lowers for easier reloads, and accepts any mil-spec lower part
- Midwest Industries lower receiver block combines a lower block, gas block roll pin tool, and magazine vise block in one polymer unit
This kit combines the AT-15 stripped lower in Burnt Bronze and Midwest Industries lower receiver block. It pairs a stripped lower with a bench tool for assembly work.
Note: This kit is not assembled. The AT-15 is a stripped lower receiver; lower parts kit, buffer system, stock, and grip are not included.
Warranty Note: Curated by AT3 Tactical. Components in this kit are covered by each manufacturer’s own warranty — AT3’s warranty does not extend to or replace the warranties of the individual parts included. Warranty terms for some component brands may not yet be listed in the warranty tab; contact the manufacturer directly for in-depth and up to date coverage details.
Specifications
- Brand: Multiple – AT3 Tactical, Midwest Industries
- Model: AT3 AT-15 Stripped Lower Kit – Burnt Bronze – w/ Midwest Lower Block
- MPN: AT3-AT15-BB-MI-LRB-KIT
- Platform: AR-15
- Lower Receiver: AT3 AT-15, forged 7075-T6 aluminum, stripped, Burnt Bronze
- Tool: Midwest Industries AR-15 Lower Receiver Block
What’s Included
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Warranty & returns
Backed by the AT3 Lifetime Warranty!

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.
This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.
In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.
If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.
If your product is in need of warranty service, please contact AT3 Tactical to start the process
Our contact info is available here. To expedite processing, please provide your order information and description of the defect.
Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.
MI Limited Lifetime Warranty!
Midwest Industries Limited Lifetime Warranty
- Midwest Industries, Inc. stands behind every item we produce. If you are the original purchaser and a MI product fails due to manufacturing, assembly, or material defect, and you have not modified or abused the item, it will be repaired or replaced for life.
- Modification or alteration to these parts including custom coatings, voids all factory warranties.
- We are not responsible for items intentionally/accidentally damaged or destroyed, or products damaged by abuse/poor maintenance.
- This warranty is limited to the repair or replacement of the part or parts which are returned to Midwest Industries, Inc. and are determined by Midwest Industries, Inc. to be defective.
- This warranty, made to the original owner/purchaser, is not transferable.
The following items are excluded from this warranty:
- Normal wear of product finishes and of all metal or plastic parts.
- Damage or malfunction resulting from accident, negligence, misuse, or unauthorized repair or modification.