I just looked it up on their website. Looks like a fail to me. The design looks ridiculous and the max cartridge length is 2.390". MDT makes a good mag that accepts longer OAL. My old plastic AI .223 mags are still going strong, feed perfect and can have OAL of 2.550 in them. Great for 80 ELD loaded looooooooooooooooooooooooong.