The 17 Design and Mfg. billet AR-15 stripped lower receiver (part no. B-AR-15-L) is machined to mil-spec dimensions with razor-thin tolerances, giving builders a foundation that works reliably with standard AR-15 components from other manufacturers. It includes a nylon-tipped upper tensioning screw in the grip tang to fine-tune the fit between the upper and lower, plus a flared magwell angle for a wider feel without increasing the receiver’s overall footprint. Sold stripped, it ships with no internal fire-control parts installed, so you choose the trigger, safety, and furniture yourself.

Key Specifications

• Machined to mil-spec dimensions with tight tolerances for reliable parts interchangeability.
• Fitted with an upper tensioning screw in the grip tang to fine-tune the upper/lower fit.
• Features a flared magwell angle for a wider feel without increasing overall footprint.
• Includes a threaded bolt catch pin for secure, serviceable installation.
• Sold as a stripped lower receiver, so no internal fire-control parts are installed.

Frequently Asked Questions

What is the upper tensioning screw for? A nylon-tipped set screw in the grip tang lets you fine-tune the fit between the upper and lower receiver to reduce wobble.

Does this lower include a trigger or other internal parts? No, it ships stripped, so you supply the fire-control group, buffer tube, and grip of your choice.

Will parts from other manufacturers fit this receiver? Yes, it is machined to mil-spec dimensions with tight tolerances specifically to ensure compatibility with other manufacturers’ parts.

Buy the 17 Design and Mfg. Billet AR-15 Stripped Lower Receiver

Order this 17 Design and Mfg. billet stripped lower receiver from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and start your build on a precision-machined foundation. Browse our full selection of AR15 lower receivers for more build options.