CZ Tactical Sport +3 Basepad by Taylor Freelance 

For the CZ "Standard IPSC" and "Tactical Sport" (not for the standard-frame CZ75, CZ85, or CZSP01). Provides +2 or +3 rounds, depending on which follower you're using. Works particularly well with the Grams Engineering spring/follower kit. Due to U.S. State Department restrictions, we cannot ship this part internationally.

Due to the design of the Grams follower the slide may or may not lock back on the last round.