Umarex Walther CP99 Compact Ejection Port Modification


You may be surprised to know that the Airgun that started off my collection was purchased only about 4 years ago. As a kid I had a few Airguns growing up and then suddenly in my late 30's I just picked it up again. Anyways the Airgun this post is focusing on is the Umarex Walther CP99 Compact. This post is not intended to be a review but in summary the CP99 Compact BB Blowback BB gun has one of the nicest trigger pulls in my collection. It is so much fun to shoot, it's very well made and is reasonably priced.

The one feature,or lack of a feature that I never really like about the Umarex CP99 Compact was the molded ejection port. In other words the ejection port is not cut out of the slide on this gun but instead is molded into the slide to look like an ejection port.

That said I have noticed a few of these Umarex CP99 Compacts sporting a cut out ejection port and so I thought to myself that maybe people have been cutting the ejection port out themselves? Hey I thought about giving it a try several times myself. So I took a walk over to the Umarex US website and low and behold if you click on the 360 view, you will see that it too has a cut out ejection port. The photos on their site do not show this new feature but rather the older molded version. I can not confirm that all new CP99 Compacts will in fact have the cut out ejection port, but it does look like Umarex has moved to this updated version…

So I thought enough is enough! It's time to pull out my tools and cut into my beloved CP99 BB gun. The best way to show you what transpired next is with a series of photos. At the end of about 2 hours of work I have to say I am very happy with the end result!

4.5mm / .177 cal, BB, Blowback, CO2, Modification, Pistol, Semi Auto CP99, Compact, Umarex