CAR-15 Retro AR-15 Lower Build Kit

No reviews yet · be the first Ask a question

1 / 1

$149.14MSRP ~~$178.96~~ Save $29.82

or 4 interest-free payments of $37.29 with Sezzle

Out of stock Get an email when it is back.

Get an email when it's back. No spam – one message when this item is in stock.

Email address

Also send AT3 news and exclusive offers

SKU: AT3-CAR15-RETRO-AR15-LWRBK

Free standard shipping on orders $139+ details
90-day no-hassle returns policy
Backed by 3 brand warranties what it covers

AT3 Tactical CAR-15 Retro AR-15 Lower Build Kit – Classic Carbine Setup

Features

Includes the lower parts needed to complete a stripped AR-15 lower receiver for a retro CAR-15-inspired carbine build
B5 Systems Retro CAR-15 stock gives the lower the slim collapsible profile associated with classic AR carbines
B5 CAR15 LS2 pistol grip keeps the furniture closer to the retro carbine look than modern textured grips
Includes mil-spec lower controls, fire control springs and pins, trigger guard, and receiver small parts
Uses a carbine buffer assembly with buffer tube, spring, 3.0 oz buffer, castle nut, and end plate

The AT3 Tactical CAR-15 Retro AR-15 Lower Build Kit is built for finishing a stripped lower on a classic CAR-15-style carbine project. It combines standard AR-15 lower controls with a B5 Retro CAR-15 stock, B5 CAR15 LS2 grip, carbine buffer assembly, and lower receiver small parts, giving builders the lower-end setup needed for a lightweight retro carbine profile without tracking down each part separately.

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: CAR-15 Retro AR-15 Lower Build Kit
MPN: AT3-CAR15-RETRO-AR15-LWRBK
Platform: AR-15
Build Style: Retro CAR-15-inspired carbine lower
Control Type: Mil-Spec
Stock: B5 Systems Retro CAR-15 Stock
Grip: B5 CAR15 LS2 AR-15 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

No reviews yet. Bought this one? Tell the next builder how it went.

Leave your review

Rating

Your Name: Your Email:

Your review:

Upload Image(s): You can upload a maximum of 2 images.
Allowed file types: .jpg, .jpeg, .gif, .png, .webp.
Maximum file size: 5MB.

No questions yet. Ask about fit, install or compatibility and our team answers within a business day.

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.

Lifetime Warranty

B5 Systems products are backed by a lifetime warranty against defects in materials and workmanship. If a covered defect appears under normal use, B5 Systems will repair or replace the product. This warranty does not cover damage caused by misuse, modification, improper installation, or normal wear and tear.

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.

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.

(3)

CAR-15 Retro AR-15 Lower Build Kit

AT3 Tactical CAR-15 Retro AR-15 Lower Build Kit – Classic Carbine Setup

Features

Specifications

What’s Included

Customer reviews

Questions & Answers

Ask a question

Thanks for the question.

Warranty & returns

Backed by the AT3 Lifetime Warranty!

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Lifetime Warranty

SWARM Warranty

90-day no-hassle returns

Customers also viewed

B5 Systems Retro CAR-15 Stock

Your cart

Product description

AT3 Tactical CAR-15 Retro AR-15 Lower Build Kit – Classic Carbine Setup

Features

Specifications

What’s Included

Customer reviews

Warranty & returns

Backed by the AT3 Lifetime Warranty!

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Lifetime Warranty

SWARM Warranty

90-day no-hassle returns

Customers also viewed

B5 Systems Retro CAR-15 Stock