A Picatinny rail on your CZ 600 lets you use any Picatinny scope rings or mounts. JK-N makes steel rails for each receiver length, made in the Czech Republic. Choose the rail for the length of your upper receiver:
Short: 0 MOA.
Medium: 0 MOA, or 25 MOA for more elevation at long range.
Long: 0 MOA.
The CZ 600 comes with a short, medium or long upper receiver, depending on the caliber:
Short: .223 Remington, 7.62x39 and .300 AAC Blackout.
Medium: .308 Winchester, 6 mm Creedmoor, 6.5 mm Creedmoor, 6.5 PRC and .243 Winchester.
Long: .30-06 Springfield, .300 Winchester Magnum and 8x57 IS.
Installation
Screws are included. Put the longer screws at the back of the rail and the shorter ones at the front. Clean the screw holes, apply medium threadlocker and tighten to 2.5 Nm.