Designed with recreational shooters in mind, the XTech Tactical Speedmag offers a uniquely easy way to reload your magazines. The robust design of the magazine allows you to pull the collar down as you drop the ammunition into the magazine. This makes it possible to drop several rounds in at a time and load your magazine in a fraction of the time with far less effort. Sore thumbs are a thing of the past when hitting the range for some target practice. The Speedmag works in all Mil-Spec AR-15 lower receivers and will accept any ammunition that fits in regular mil-spec magazines like .223 Remington, 5.56 NATO, and .300 AAC Blackout. Mfg: Xtech Tactical