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

100% Winner, A+

by -

You can't beat this at the price their selling. Tight fit and lockup with Anderson upper, Gorilla Manufacturing Upper and PSA upper. The cutouts are awesome. Similar lowers going for double. Thank PA!!!!

Very Nice! Love the look !

by -

Very nice lower! Everything went together nicely. Fit and finish are top notch. I love the clean lines and fresh look. Makes my mil-spec forged lower look outdated. My only gripe with this lower is my Magpul B.A.D. Lever will not work with it. I can mount it, but the area around the bolt catch release is thicker than mil-spec and flat so the bolt catch will not function... had to remove it :(

Billet 17 Design

by -

Really impressed and like this lower. Everything fit like it should, threads etc were fine. Material in great condition. I like it comes with a screw so if needed you can fix wobble once you install the upper, although mine didn’t really need it too much. Very satisfied and would recommend - I’m ready to build another one, this was my first one - I may get forged lower next time I did have some fitting issues on bolt catch from a couple companies if you want something other than mil-spec, ended up going with a strike industries one - but that’s with a lot of billet lowers out there, just be mindful of that if you go this route. Very satisfied and customer service with primary arms and 17 design is great, 17 design recommended the SI bolt catch and also helped me with mags they use for this lower -pmags work fine of various gens including the 40 rounders.

Super Solid Just as good as The Aero M4E1

by -

This is an excellent lower at a great value. I purchased one a few months ago and noticed it’s the same quality as my Aero M4E1 lowers at a great cost. Highly recommend. There’s a sale today at nearly half off. I’m buying 2 to keep for a rainy day.

Great design


Very well designed. I like the threaded bolt catch pin. Good solid base for any build

Billet stripped lower


Well I had bought 2 Anderson lowers the week before and both went together well and no issues. I decided I would like to pick up another one for a PSA build I’m working on and seen the 17 design billet lower and it was only 20 bucks more so I thought I would give it a try and wow I was not disappointed. I almost went back into the shop to ask are you sure this is priced correctly but thought well think I’ll keep it to my self. It went together so well I thought to myself wow I am getting really good at this, sure helps when the quality is this high makes everyone look like a pro.

Far better than I expected!!


Fit and finish where spot on, this is a perfectly milled lower and worth twice what I paid for it. It far exceeded my expectations.

17 Design Billet Lower


This lower turned out to be very nice aesthetically but it does have one issue. Polymer magazines & some of my 7.62x39 magazines are very tight in the magwell. I’m using this lower for a 350 Legend build so it’s not a big deal for me because I use Duramag metal magazines & they fit this lower perfectly but anyone hoping to use polymer magazines or 7.62x39 magazines should choose a different lower. All of my metal 450 Bushmaster, 5.56 & 350 legend magazines fit & drop free perfectly though. Other than that everything else is great about this lower & I still would recommend it but just consider what I’m saying before you do. If this company would more throughly check all the magwell’s before sending them out these lowers could one day be 5 stars. Most people that buy these will likely be using them for 5.56/.223 or 300 Blackout & they most definitely will want to be able to use PMAGS with this lower for those calibers.

Nice Receiver !

by -

My only complaint is that standard mag release buttons aren't quite long enough for this receiver so I'd suggest an extended length button or possibly a Strike Industries mag release as they're a little longer than most.
<br>Otherwise...great receiver.

Solid build


This lower worked great for me. A solid build and for a good price