17 Design Billet AR15 Lower Receiver


Free Shipping!

Availability: In stock

SKU: 17D-00-NFDLAR15 Categories: , , Tags: ,

17 Design Billet AR15 Lower Receiver

The 17 Design & Manufacturing AR15 Stripped Lower Receiver is the perfect base for your AR15 build. Machined to mil-spec dimensions, their lowers work with standard AR15 components and ensure the highest quality and parts interchangeability.

The 17 Design Billet AR15 Lower will accept any standard Mil-Spec AR15 upper receiver and features a nylon-tipped tensioning set screw inserted in the grip tang to allow users to fine-tune the fit of the upper and lower receiver.  Other great features, discussed below, bring big value to the AR builder.  The 17 Design billet lower is machined to razor-thin tolerances from a solid billet of 7075-T6 aluminum and finished in a hard-coat anodized finish.


  • Upper Tension Screw - Allows users to fine-tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
  • Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look.
  • Threaded Bolt Catch Roll Pin - Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16" Hex Key required for assembly.
  • Integrated Trigger Guard - Eliminates the possibility of breaking the trigger guard tabs by integrating the trigger guard into the lower, creating a stronger more rigid platform to build upon.

Based in Oklahoma City, OK, 17 Design and Manufacturing has deep roots in the firearms and defense industry.  They've consulted for some of the most well-known AR15 manufacturers in the industry and done contract manufacturing for law enforcement and military agencies for over a decade.  Learn more about 17 Design & Manufacturing here.

FFL Terms & Conditions

FFL Order Processing Lead Times:  Click Here
– Prices do not include your dealer’s transfer fees.
– Review our FFL Ordering Instructions HERE before placing your order.
Not eligible for return after transferred into your possession via ATF Form 4473.

There will be a 30% restocking fee on all controlled items returned because of failed background checks.

Federal law requires that you be 21 years or age or older to purchase a pistol, stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun. However, they still are “firearms” by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.
Ships to FFL? Yes
Manufacturer 17 Design
Platform AR15
Finish Black Hardcoat Anodize
Pin Size Mil Spec 0.154"

Arm or Ally is a stocking dealer for all Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, CMC Triggers, HIPERFIRE and named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!  See our growing inventory of AR Parts, and Reloading Components.

Weight 16 oz
Dimensions 9 × 6 × 3 in

17 Design

Part Type

Lower Receiver, Lower Receiver Parts



Scroll to Top