17 Design Billet AR-15 Stripped Lower Receiver - Black

Manufactured by 17 Design & Mfg.
SKU: 17-17D-00-NFDLAR15-1
MPN: 17-17D-00-NFDLAR15-1
Manufactured by 17 Design & Mfg.
110 Reviews
$69.99 $129.99

Out of Stock

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 ffl@primaryarms.com.



Start your next AR-15 build with this Mil-spec black anodized billet AR-15 aluminum receiver! This AR-15 stripped lower is made in Oklahoma City, OK by 17 Design and Manufacturing, a company that equips military and law enforcement with small and medium machining capabilities as a contract manufacturing and engineering focused shop. Now they are selling billet lower receivers to the public.

  • Mil-Spec dimensions
  • Machined from a billet of 7075-T6 aluminum
  • Stripped
  • Black hardcoat anodized
  • Integral trigger guard
  • Threaded bolt catch roll pin

Save money by building your own rifle from parts. Learn about how the firearm functions by assembling it yourself. Hand pick each component to suit your precise needs. 

Accuracy in machining is crucial to ensure your receiver will be compatible with parts from other manufacturers. 17 Design and Manufacturing has razor thin tolerance levels and personally oversees the development, design and machining of every part that comes off the line. They're not like every other manufacturer. 

Whether you're stocking up for a rainy day or looking to get started on your next build, grab one of these billet stripped lowers while supplies last!
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Brand17 Design & Mfg.
Caliber MarkingMulti-Caliber
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154

Nice Billet Lower


Nicely machined. Nice finish. Low price point for a billet lower. Married nicely to an Aero Upper; no need to adjust the lower tension screw. A threaded bolt catch with a set screw eliminates the need to tap in a roll pin. Suggest using an enhanced magazine release button due to the extra wall thickness of this billet lower. Other websites indicated some QC issues that apparently have been worked out.

17 Design Billet - nice, very nice

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These are very nice lowers, I’ve put dozens of lowers together from all different manufacturers. Got to say, the threaded bolt release pin is a great idea. The rest went together without any issues. Finish is nice too. Scores a 10 out of 10 for me.

Excellent lower. Worth the cost.


This lower is Excellent. Precisely made, high quality, everything in spec. AND the only lower I found with a nicely flared mag well, integral trigger guard (oversize for gloved hands) and and a captive bolt catch pin - no tiny roll pins to pound in.
<br>Built a DMR with an 18" 1/8 HB upper, quality parts kit and match trigger. The upper fit precisely with zero daylight and no play. Thx for the stimulus check, new administration. Putting it to good use!

Better than Aero Precision

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Amazing quality.



I bought this because I assumed that all of the reviews, even if exaggerating, it had to be half decent. Turns out they weren't exaggerating. This lower is beautiful with hard edges and matched up to my Aero Upper perfectly. No slop, no play, all business. The raised side only somewhat interferes with my phase 5 extended bolt catch, but after all assembled, its not to bad. Just a little break in wear required. I originally didn't want to write another good review as I want these to stay available. I have a go to for my next 300BO pistol build.

Good stuff

by -

Excellent quality. Made for a smooth build.

17 design billet lower

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High quality lower excellent fit and finish

Impressed!!! Pleasantly


Really impressed with the quality of these, billet upper with a threaded bolt catch pin and integrated trigger guard for $130. No tooling marks anywhere, everything looks top notch. Also has the nylon tipped screw for adjusting any play with lower and upper receivers, although I don't think it will be needed.

Comparable to Aero Precision

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I'll keep this review short and sweet.
<br>The 17 Design lower is comparable in my mid to the M4E1 lower by Aero Precision but I'm docking it a star for the following reasons:
<br>1. More expensive but lower overall quality.
<br>2. Very noticeable tool marks all over the receiver.
<br>3. Poor quality hard coat, noticeably thin in several spots.
<br>4. Slightly heavier than the M4E1
<br>Now it's still a good lower receiver, but I was expecting something with far better quality when given the cost. Mind you, if you're just desperate to have a lower receiver then you're not going to care how bad 17 Design's QC is.

Quality Billet Lower


Took a flyer on this lower as it was in stock, it was billet and at a great price. This did not disappoint. All millspec assembly parts went in perfectly, it functions great and the fit and finish is excellent. Will buy again for sure. Well done.