Guntec USA 9mm Magwell Conversion Block AR15 Adapter AR-15
Compatible magazines: -Spike's Tactical/Metalform -Metalform -Modified Uzi -ProMags -Colt/Metalform -Beta-C drums
As you can see, you have a great selection of mags to choose from so you won’t be stuck with only having to buy one manufacturer’s magazine! Installation of the block is a breeze. The entire installation process takes less than 5 minutes to get the block up and running inside of your lower and takes about 5 minutes to take it out, so it’s perfect for you guys who love to switch calibers at the range all day. There is zero gunsmithing required and zero permanent modifications to the rifle/pistol are made. The block also utilizes the standard AR-15 bolt catch so you won’t need to change it out for another aftermarket part.