Big & Tall AR-15 Lower Build Kit
or 4 interest-free payments of $62.04 with 
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
- 90-day no-hassle returns policy
- Backed by 3 brand warranties what it covers
Product description
AT3 Tactical Big & Tall AR-15 Lower Build Kit – Full-Size Comfort Setup
Features
- Includes the lower parts needed to complete a stripped AR-15 lower receiver with a larger, more forgiving furniture setup
- Magpul ACS stock and .70 inch rubber buttpad add length and rear-end surface area for shooters who need more stock behind the receiver
- Magpul MOE-K2+ grip gives the lower a fuller rubber-overmolded grip with a more vertical angle than a basic A2 grip
- Timber Creek oversized trigger guard adds extra room around the trigger area, especially useful with gloves or larger hands
- Carbine buffer assembly includes buffer tube, buffer spring, 3.0 oz carbine buffer, castle nut, and end plate
The AT3 Tactical Big & Tall AR-15 Lower Build Kit is built for finishing a stripped lower with furniture that better fits larger hands, longer arms, or shooters who simply want more contact surface on the rifle. It combines standard AR-15 lower controls with a Magpul MOE-K2+ grip, Magpul ACS storage stock, extended rubber buttpad, oversized trigger guard, and carbine buffer assembly for a lower setup that feels less cramped than a basic mil-spec furniture package.
Note: This kit is not assembled. Stripped lower receiver is 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: AT3 Tactical
- Model: Big & Tall AR-15 Lower Build Kit
- MPN: AT3-BNT-AR15-LWRBK
- Platform: AR-15
- Build Style: Full-size comfort carbine lower
- Control Type: Mil-Spec
- Stock: Magpul ACS Carbine Storage Stock – Mil-Spec
- Buttpad: Magpul .70 inch Rubber Buttpad for CTR/MOE/UBR/ACS
- Grip: Magpul MOE-K2+ Pistol Grip
- Trigger Guard: Timber Creek Outdoors Oversized Trigger Guard
- Buffer System: Carbine buffer assembly
- Buffer Weight: 3.0 oz
- Color: Black
What’s Included
- 1x AT3 AR-15 Mil-Spec Bolt Catch – Black
- 1x AT3 Mil-Spec AR-15 Bolt Catch Plunger
- 1x AT3 Mil-Spec AR-15 Bolt Catch Pin
- 1x AT3 Mil-Spec AR-15 Bolt Catch Spring
- 1x AT3 Mil-Spec AR-15 Buffer Retainer
- 1x AT3 Mil-Spec AR-15 Buffer Retainer Spring
- 1x AT3 Mil-Spec AR-15 Magazine Catch – Black
- 1x AT3 Mil-Spec AR-15 Magazine Catch Button – Black
- 1x AT3 Mil-Spec AR-15 Magazine Catch Spring
- 1x AT3 Mil-Spec AR-15 Pivot Pin – Black
- 2x AT3 Mil-Spec AR-15 Pivot Pin/Takedown Pin Detent
- 2x AT3 Mil-Spec AR-15 Pivot Pin/Takedown Pin Detent Spring
- 1x AT3 Mil-Spec AR-15 Safety Selector – Black
- 1x AT3 Mil-Spec AR-15 Selector Detent
- 1x AT3 Mil-Spec AR-15 Selector Detent Spring
- 1x AT3 Mil-Spec AR-15 Takedown Pin – Black
- 1x AT3 Mil-Spec AR-15 Pistol Grip Screw
- 1x AT3™ Enhanced Nickel Teflon Single-Stage AR-15 Trigger – Curved
- 1x AT3 Mil-Spec AR-15 Disconnector Spring
- 1x AT3 Mil-Spec AR-15 Hammer Spring
- 2x AT3 Mil-Spec AR-15 Hammer/Trigger Pin
- 1x AT3 Mil-Spec AR-15 Trigger Spring
- 1x AT3 Carbine Buffer – 3.0 oz
- 1x AT3 Carbine Buffer Spring for AR-15
- 1x AT3 Castle Nut for AR-15 Buffer Tubes – Black
- 1x AT3 Mil-Spec Buffer Tube – AR-15 – Black
- 1x AT3 Mil-Spec End Plate for AR-15 – Black
- 1x Timber Creek Outdoors AR Oversized Trigger Guard – Black
- 1x Magpul MOE-K2+ Pistol Grip – Black
- 1x Magpul ACS Carbine Storage Stock – Mil-Spec – Black
- 1x Magpul .70 inch Rubber Buttpad for CTR/MOE/UBR/ACS
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Questions & Answers
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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.
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.
Backed by the TCO Lifetime Warranty!
Timber Creek Outdoors Lifetime Warranty
All Timber Creek products are backed by a Lifetime Warranty. To process the warranty request we require a detailed photo of the defective product and send it to info@timbercreekoutdoorsinc.com. If the defect can not be verified via photo, we may require that the product be returned.
You can also call the hotline 541-746-6198.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.