The top deal with I'm told has five screws and not six as I examine a number of the earlier top addresses not being compatible with medium-major barrels. You'll be able to see the real difference In this particular photo, the very best chassis has the right Mod one receiver extension chas

The bolt is locked when on safe, but a bolt release button lets the chamber to become unloaded without disengaging the safety. CZ Obviously needed the 600 to have a modular receiver that may be used for each light and magnum-chambered rifles. The flat-bottomed receiver is break up at its front as