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32 of 32 Items
32 of 32 Items

Custom rifle and pistol AR build kits for the most popular calibers.

You've gotten all learned up on how to build an AR-15 (because you read our awesome parts guide). Now you're ready to pull the trigger, so to speak, on a build kit. We've got your six with dozens of quality, custom-built AR parts kits that include everything you need except the lower itself. 

AR kits in .308, 5.56/.223, 300 BLK, 6.5mm and more.

The AR platform can serve virtually any purpose: Hunting, sporting, close-quarters and personal defense, precision and long-range, suppressed and subsonic, you name it. That's why we've carefully selected and crafted every build it in a plethora of the top calibers AR owners love to shoot. We took care to make sure each caliber's kit provides the optimal twist rate, barrel length, weight and parts for superior accuracy and reliability, no matter what grain weight you hand-load or buy to shoot.

Why grab our AR kits? Why not elsewhere?

There are loads of AR makers and distributors selling all kinds of flashy-lookin' AR kits. But we know what makes or breaks a great AR-type rifle or pistol, and we consider every spec that goes into each part, from muzzle to buffer:

  • All carbon barrels forged from MIL-B-11595 E steel (4150 or Chromoly Vanadium)
  • All carbon barrels and chambers treated with Nitride (Melonite) or Phosphate coating
  • All stainless / match barrels forged from Crucible 416R steel for sub-MOA accuracy
  • All bolt carrier groups (BCGs) full-auto, staked, M16 profile, chrome-lined
  • All stripped upper receivers forged from mil-spec 7075 T6 aluminum
  • All buffer assemblies and lower parts kits are mil-spec in fit and finish

Benefits of Building with an AR Kit:

Your custom AR kit awaits.

 


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

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.