While most shooters know what the functions of the trigger, gas system, and bolt carrier are, the buffer tube - and its internals - are a li

So you’re looking at AR15 complete uppers to save you time on your next build. Naturally you’re considering things like barrel alloy composi

When building an AR-style rifle with an AR 15 complete upper, you’ll want to make some important decisions as to what parts to pair with it

At MCS Gearup, we sell a wide range of complete, assembled uppers that builders can use to customize or build complete sporting rifles at ho

You can own an AR-15 and enjoy shooting it without ever breaking out a set of tools to do advanced maintenance or make substantial customiza