Key Differences Between AR10 Lower and AR15 Lower Receivers
The Fundamental Architectural Variations While they may look similar to the untrained eye, the AR10 and AR15 lower receivers are fundamentally different components designed for entirely different calibers. The AR15 was built around the .223 Remington/5.56 NATO cartridge, while the AR10 was the original design meant for the larger .308 Winchester/7.62×51 NATO round. Because of … Read more