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SBA3 MOE Pistol Lower Build Kit

In stock! Ships within 24 hours or the next business day!

Looking for a convenient way to complete your pistol-sized AR? Complete your AR-15 pistol build the right way with the SBA3 MOE Pistol Lower Build Kit! It features the quality SBA3 pistol brace by SB Tactical and an upgraded lower parts kit.

This SBA3 MOE Pistol Lower Build Kit includes everything you need to finish off the bottom half of your AR pistol. It's got an upgraded lower parts kit with an upgraded trigger, Magpul MOE grip and trigger guard, and comes with a complete mil-spec 5-position carbine buffer tube assembly and an SB Tactical SBA3 Adjustable Pistol Brace.

Need help? Here's how to install the AR lower parts kit.

SB Tactical SBA3 Pistol Stabilizing AR Brace

As the originator of the Pistol Stabilizing Brace, SB Tactical brilliantly engineers expertly constructed solutions that push every limit. The 5-stop SB Tactical SBA3 adjustable pistol brace features a clean design and superior support.

The SB Tactical SBA3 pistol brace is one of the best braces on the market. Designed for all AR platforms capable of accepting a mil-spec carbine buffer tube, the SBA3 brace is a 5-position adjustable, pistol stabilizing AR brace. The SBA3 brace dramatically enhances stability and control of the firearm by adding a third point of contact.  You just strap the ATF-compliant pistol brace to your forearm and you'll be hitting targets with your rifle-style pistol in no time. It also features a minimalist design with an integral, ambidextrous QD sling socket.

Note: Due to ATF rule 2021R-08F, any pistol with a stabilizing brace is considered a short-barreled rifle (SBR), and is therefore considered a National Firearms Act item requiring a federal tax stamp.


  • Minimalist design
  • Made from black polymer
  • 5-position adjustable
  • 7075 MIL-SPEC carbine receiver extension included
  • Ambidextrous QD sling socket
  • ATF compliant, US veteran designed 

Upgraded AR Pistol Lower Parts Kit:

Featuring a Magpul grip & trigger guard, your new AR pistol will be ready for any and all shooting conditions, rain or shine. You can even shoot while wearing gloves, thanks to the oversized MOE trigger guard. The enhanced polished trigger helps reduce pull weight and is built to last. The trigger is noticeably smoother than mil-spec and a great economical upgrade. This super crisp, single stage, government-style fire control group has finely polished interacting surfaces topped off with a silky smooth nickel boron finish.


  • Magpul grip
  • Magpul trigger guard
  • Carbine buffer spring
  • 6 position mil-spec buffer tube
  • Mil-spec single stage fire control group
  • Black oxide coated hammer and trigger springs
  • Includes castle nut
  • Includes latch plate
  • Carbine (3.0-oz) buffer

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.

GunBuilders.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

SB Tactical

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.