MC16 Fits Aluminum Magazines. Magazine coupler doubles available ammunition capacity and allows faster reloading saving precious seconds. Features Wide gap between magazines- allows for quicker magazine changes Made of light density polymer- very lightweight. Improved durable design. Will not scratch or deform magazines. Screw tightened No gunsmithing required. Lifetime warranty. 100% customer satisfaction. Made in Israel Eligibility Aluminum Magazines Materials Made of Polymer Measurements Weight(lb): .13 lbs Height(in): 7" Width(in):5"