I often cringe when I see some product engineered to comply with the byzantine gun laws in these localities. So I was pleasantly surprised when I first saw the MAG Coupler. Here’s a product that — while catering to shooters facing magazine capacity restrictions — is simply just plain clever and cool.

For Modern Sporting Rifles, This Accessory May Be The Smartest Investment

By Dave Workman - “Why didn’t you think of that?

The CZ27s went primarily to the German Army, but pistols were produced for the Kriegsmarine, Police, and a small number for commercial / non‑military use. 

In March 1939, Hitler’s forces invaded and occupied Czechoslovakia.  The Strakonice arms factory was under control of the Germans and to supply several types of arms to the German war machine, including the CZ27. By 1941, small arms production shifted into high gear.