Building a reliable semi-automatic rifle chambered for the .17 HMR can be a challenge, but Rock River Arms seems to have ...

Ar15.com user [HaveBlue] has been working for some time on a 3D printed lower receiver, and now reports that the parts are fully working. Using a Stratasys 3D printer from the 90’s [HaveBlue ...

Springfield Armory entered the popular AR-15 market in 2016 with its Saint ... from Colt-pattern 32-round magazines. Its upper and lower receivers are forged 7075 T6 aluminum with a Type III ...