AR15 Lowers

The M4E1 VS AR15 receivers are functionally the same and the only differences are design and small ergonomical features. Ultimately, all of them can work with standard lower parts kits.As far as upper receiver goes, the M4E1 offers two versions. The threaded upper receiver and the enhanced upper receiver. The enhanced upper uses a one […]

Most AR15 lowers are the same in terms of functionality. Most lower receiver accessories will fit. however, machining tolerances may vary from one company to another, including the trigger group pin holes. Yes, you can mix and match an AR15 upper from one company and match it with a lower receiver from other, but they may