At SierraPapa we are enthusiastic Beretta CX4 owners.

Having purchased two of the carbines our initial pleasure in their use was reduced by the obviously penny-pinching construction of some of the interior components. We also suspected that these low-budget components were adversely effecting the overall performance of the firearm.

As we visited internet forums to learn more about the CX4 we noted that we were not the only people disappointed with some aspects of the CX4. We decided to attempt to provide solutions to remove some of the common complaints.

Our parent company has considerable experience in the fields of metal machining, plastics molding and general mechanical fabrication. We felt confidant that we could apply this experience to upgrading vital CX4 components.

Brian is the owner of SierraPapa's parent company and the designer of the CX4 upgrade parts.