AT3 Tactical Ambi AR-15 Lower Build Kit - No Stock
or 4 interest-free payments of $28.79 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 the AT3 Lifetime Warranty! what it covers
Product description
AT3 Tactical Ambi AR-15 Lower Build Kit – No Stock
Features
- Includes the lower receiver controls, small parts, grip, and carbine buffer assembly for an AR-15 lower build
- Ambidextrous magazine release and ambidextrous safety selector give the lower improved left- and right-side control access
- Includes AT3 enhanced trigger guard, A2 pistol grip, buffer tube, buffer spring, carbine buffer, castle nut, and end plate
- No-stock configuration is useful for builders who already have a specific stock picked out
- Built with black lower parts and mil-spec style hardware for a clean standard setup
The AT3 Tactical Ambi AR-15 Lower Build Kit – No Stock gives builders the core parts for setting up an AR-15 lower while leaving the stock choice open. It is a good fit for builds that need ambidextrous controls, a carbine buffer assembly, and standard lower hardware without paying for a stock that may be replaced anyway.
Note: This kit is not assembled. Stripped lower receiver, stock, and fire control group are not included.
Specifications
- Brand: AT3 Tactical
- Model: Ambi AR-15 Lower Build Kit – No Stock
- MPN: AT3-AMBI-AR15-LWRBK-NS
- Platform: AR-15
- Controls: Ambidextrous magazine release and ambidextrous safety selector
- Grip: A2 mil-spec pistol grip
- 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 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
- 2x AT3 Mil-Spec AR-15 Pivot Pin/Takedown Pin Detent Spring
- 1x AT3 AR-15 Enhanced Trigger Guard Assembly
- 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 Pistol Grip Lock Washer
- 1x AT3 Mil-Spec AR-15 Pistol Grip Screw
- 1x AT3 Mil-Spec AR-15 Pivot Pin – Black
- 1x AT3 Mil-Spec AR-15 Bolt Catch Plunger
- 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
- 2x AT3 Mil-Spec AR-15 Pivot Pin/Takedown Pin Detent
- 1x Arms Unlimited Ambidextrous AR-15 Magazine Release
- 1x AT3 Ambidextrous AR-15 Safety Selector – Black
- 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 AT3 AR-15 A2 Mil-Spec Pistol Grip
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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.
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.


