MIL-SPEC Complete AR-15 Lower Receiver w/Brace

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SKU: AT3-MILSPEC-AR15-COMLWR-WBRACE

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.

Free standard shipping on orders $139+ details
Backed by 3 brand warranties what it covers

AT3 Tactical Mil-Spec Complete AR-15 Lower Receiver with Brace

Built to Order – Ships Within 3 Business Days

Features

Assembled complete AR-15 lower receiver built on the AT3 AT-15 forged 7075-T6 aluminum lower
Magpul BSL pistol brace gives this lower a brace-equipped setup instead of a standard rifle stock configuration
AT-15 lower features mil-spec AR-15 compatibility, “Cal Multi” markings, pictogram safety markings, and a deeper-than-mil-spec flared magwell
Includes installed AT3 GI curved trigger, STNGR 7075 trigger guard, A2 pistol grip, and carbine buffer assembly
AT3-curated configuration built around function, ease of use, and commonly paired parts for a straightforward AR-15 lower setup

This complete AR-15 lower receiver is assembled from an AT3-curated parts selection built around function, ease of use, and components commonly purchased together. It pairs mil-spec controls with an AT3 GI curved trigger, A2 grip, STNGR trigger guard, carbine buffer assembly, and Magpul BSL pistol brace for a simple brace-equipped lower configuration.

Already have a lower? This same parts package is also available as an unassembled lower build kit without the receiver.

Note: This configuration includes a pistol brace, not a rifle stock. Parts may vary based on availability and may be substituted with components of equal or greater value. Individual branded components are covered by their respective manufacturer warranties.

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: AT3 Tactical
Model: Mil-Spec Complete AR-15 Lower Receiver with Brace
MPN: AT3-MILSPEC-AR15-COMLWR-WBRACE
Platform: AR-15
Configuration: Assembled complete AR-15 lower receiver
Lower Receiver: AT3 AT-15 Stripped Lower Receiver – Anodized Black
Lower Receiver Material: Forged 7075-T6 aluminum
Lower Receiver Finish: Type 3 hardcoat anodized black
Lower Receiver Markings: “Cal Multi” with pictogram safety markings
Control Type: Mil-Spec
Trigger: AT3 GI Mil-Spec AR-15 Trigger – Curved
Brace: Magpul BSL AR-15 Pistol Arm Brace
Grip: AT3 AR-15 A2 Mil-Spec Pistol Grip
Trigger Guard: STNGR Mil-Spec 7075 Trigger Guard Assembly
Buffer System: Carbine buffer assembly
Buffer Weight: 3.0 oz
Color: Black

What’s Included

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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.

Backed by Magpul Warranty!

Magpul Warranty Information

If you ever experience an issue with a Magpul product at any time, regardless of where it was purchased, please contact us directly and we’ll do everything reasonable to help you.

To make a return, please take the following steps:

BEFORE returning any products, please contact us first to receive an RMA number (Return Merchandise Authorization) and prominently write it on the outside of the package. Packages will not be accepted without an RMA.
Include a note with your name, shipping address, phone number and email, RMA number, and reason for the return (including, if applicable, information about the firearm, ammunition, and usage environment for defective returns). Do not send ammunition.
Wrap the item with quality padding and place it in the original packaging or in an appropriate box for shipping.
A UPS shipping label will be provided in your shipment. If using the original packaging, remove or cover the original shipping label. Tape the preprinted return shipping label to the outside of the box. Drop package at an official or authorized UPS drop-off location.
All refunds will be applied to the credit card used for the original purchase. You should allow one to two billing cycles for the refund to appear on your statement.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

SWARM Warranty

SWARM Warranty

STNGR USA products are warranted to the *original purchaser against any defects in materials and workmanship for the lifetime of the product. STNGR USA has sole discretion to determine manufacturer’s defects. The Swarm Warranty policy does not cover loss or theft. Cosmetic damage or changes that leave the product still in a functional condition, damage from improper use or intentional damages are also not covered by the warranty and will not be accepted. Items that have been modified or in any way altered from the original condition are not covered by the Swarm Warranty.

Eyewear lenses are fully covered by a 1 year scratch warranty. If you scratch or damage your lenses within 1 year of purchasing, STNGR will send you up to 1 pair of replacement lenses. This warranty only applies to the original purchase and not subsequent replacements. You also qualify for **20% off replacement lenses for life. Email support@stngrusa.com to receive your discount code.

Eyewear Lost & Broken Replacement Discount

Sometimes life happens. If you ever break or lose your sunglasses, no matter the reason, you’re covered with a hefty discount. Shoot STNGR an email at support@stngrusa.com and you’ll get you hooked up with an exclusive 30% discount on future replacements.

*The original purchaser may have purchased from any of the following sources: Directly from STNGR (stngrusa.com or stngredge.com) or from an authorized dealer, distributor, or retailer. The original purchaser may be asked to show proof of purchase.

**The 20% discount is subject to replacement lens availability.

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MIL-SPEC Complete AR-15 Lower Receiver w/Brace

AT3 Tactical Mil-Spec Complete AR-15 Lower Receiver with Brace