SIG: Take best quality AR ambi charging handle available and add some innovation, and you develop the best ambidextrous charge handles and blocks available for  the SIG MPX and MCX. 

We took our industry’s best, tested, and proven AR ambidextrous charge handle and redesigned it specifically for the SIG platforms.  We inspected the Sig platforms and found some weaknesses, then sought out to fix them.  The MPX Lifter Block holds the ambi charging handle up and eliminates the slop found in the factory model.  The MCX block replaces the molded plastic OEM block from the factory. 

We make the blocks from solid billet steel that adds strength and durability to your rifle.