Battle Arms Development Billet AR-15 Upper and Lower Receiver Set

Manufactured by Battle Arms Development
Manufactured by Battle Arms Development
4 Reviews

Out of Stock

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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



The Battle Arms Development Lightweight Billet Upper and Lower set is precision cut from high strength billet 7075-T6 aluminum with an exceptionally lightweight design. Excess material has been removed wherever possible without reducing the integrity of the receivers, allowing this matched set to weigh in at just over 13 ounces. The lower is fully compatible with MIL-SPEC components as well as the Battle Arms Development line of ambidextrous standard and short throw safeties. Featuring an integral enhanced trigger guard and a vastly superior set screw bolt catch installation typically only found on large frame receivers (set screw included!).

Lower receiver:
  • Billet 7075-T6 aerospace aluminum
  • Patent pending lightweight design
  • Laser engraved logo
  • MIL-A-8625F Type III Class 2 hardcoat anodized finish
  • Compatible with MIL-SPEC lower receiver parts 
  • Dimensional accuracy inspected
  • All sharp edges de-burred by hand
  • Pictograph selector markings marked for 90° or short throw safeties.
  • Relief cut for battle arms development short throw safeties.
  • Multi caliber marking for build versatility
  • Flared and beveled magwell
  • Set screw installation for bolt catch
  • Captured takedown pin detent spring (set screw included)
  • Upper/lower receiver tension screw (screw included)
  • Integrated trigger guard
  • Weight: 6.84 oz

Upper receiver:
  • Compatible with FORTIS REV II Rail (with indexing tabs)
  • Billet 7075-T6 aerospace aluminum
  • Patent pending lightweight design
  • M4 feed ramps
  • Machined T-marks
  • Laser engraved logo
  • MIL-A-8625F Type III Class 2 hardcoat anodized flat black finish
  • Compatible with MIL-SPEC AR upper receiver parts
  • Weight: 6.28 oz

Each receiver set is hand deburred, matched, and inspected for dimensional accuracy, ensuring you receive the highest quality set for your build.
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BrandBattle Arms Development
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Manufacturer.Battle Arms Development
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
Weight13.15 Oz
Feed RampsM4
Forward Assist
Port Door

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

4 reviews

  • 4 stars
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  • 3 stars
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  • 2 stars
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Battle Arms Development = B.A.D. Prouducts


I love Primary Arms. I despise Battle Arms. The receiver kit does not fit all magazines. Some including the new Magpul magazines don't fit properly. I found that not all bolt carriers fit either! Have a Superlative Arms piston bolt carrier? Don't buy this set then because it won't fit. Yeah the set looks nice but it you don't use their proprietary pieces, you are taking a craps shoot on fitment. Their customer service ALWAYS says that their prouduct isn't the problem, it's the other manufactures that are out of spec. Really? That's funny because the issue is only always with Battle Arms prouducts. I never had a fitment issue with Seekins Precision uppers/lowers. Bottom line, save your hard earned money and buy a set from another manufacture that makes better components and stands behind their product.

Love it


Love this set. If there is a problem the set is tight. However super light, Had no issues, all mags work well (Pmag, Lancer). This works fine with my JP Lmass carrier and my cheap one that came in my first AR. Radiant Charging handle work great along with the safety. Trigger drops in fine. I don't haven problems like the other guy. I have never had a BCG not work in any receiver. The Mag well can go either way, your thumb lands nice to remove the mag. On the other hand I think it is a little easier to swap with a level mag well. My total weight with scope is under 6 lbs 4 oz

Some people like to complain

by -

I'm not exactly sure what people's issues are with this receiver set. It's often on sale and if you combine it with PA's 12% discount they offer from time-to-time, it's a smoking deal for an extremely light weight billet receiver set. One reviewer complained of new Magpul mags not working with the receiver...just take a round out of your magazine and you're good to go! My only complaint is compatibility with some manufacturers parts due to the lines and contours of the receiver, such as the area around the magazine release. I recommend just putting parts from Battle Arms on it to customize/upgrade your weapon. Like I said, it's a great price for a well thought out, lightweight receiver set that's made in the USA.

Great Receiver


Purchased this receiver and had one of the easiest builds ever with it. I put Various different manufactures parts on it with 0 issues. Fit and finish are outstanding. Weight is super light and every magazine I own (Magpul Gne 2 and Gen 3, Lancer and GI mags all work and seat just fine( all with 30 rounds). If I can get it on sale would purchase again.