MCX is getting to be my favorite carbine on the market right now. Not revolutionary but evolutionary from the M1/AR180 platform. This is the gas piston AR at its finest. The design got rid of all the bugs of converting an AR into a piston gun, but designed the platform from the start as a piston carbine. My MCX has been extremely reliable and accurate. It does not have the piston recoil common to the piston AR on the market. the felt recoil is very low while split time between shots are amazing.




















Although the MCX upper can be fitted directly to a regular AR lower, SIG designed an adapter that will also fit all the stock options available to the MCX.