Semi auto bolt kit for the CZECH 23, 24, 25, or 26. This bolt has a hold open feature. It works with a modified trigger group and the safety is functional. Comes with parts and instructions for assembly. This is compatible with our semi auto tube (CZ24/26SAT). A $100 core charge is included in the price of this kit, you will need to ship your original striped bolt to our PO BOX address at the bottom of this page to receive the core charge back. Please include a note with your NAME and ORDER NUMBER. The ATF has approved this design as a pistol. Attaching a shoulder stock with a barrel less than 16" is NOT recommended.