AR 15 Parts

Everything you need for your next AR 15 lower build, and repair parts too. Whether you just need one lower receiver or a lower receiver kit, you are in the right place. Ultra Modern Firearms offers great prices on AR 15 Parts and Stripped Lower Receivers, as well as free shipping on AR 15 Lowers and parts with orders at $100.00 or more.  In this section you will find, lower receiver parts, stripped lower receivers, upper receiver parts, and more. Some of the brands we carry are: Anderson, DPMS, DS Arms, Magpul, and Spikes Tactical. If you don’t see what you are looking for feel free to contact us with any questions or suggestions. Check back often as we will be adding products, and additional brands. Use the product filter on the right to help you find what you want to buy today.

FREE SHIPPING on all orders $90.00 or over! *excluding long guns & oversized handguns