A Picatinny rail lets you use any Picatinny scope rings or mounts on your Brno ZKM 452. JK-N makes two steel rails, 0 MOA, made in the Czech Republic, with screws included. Choose the rail by the width of your dovetail:
11 mm: for the ZKM 452 with an 11 mm dovetail.
16 mm: for the ZKM 452 and ZKM 456 with a 16 mm dovetail, and the ZKM mod. 2 and mod. 4.
Tighten the screws to 2 to 2.5 Nm. Rails for other CZ rifles are in Picatinny rails.
Frequently asked questions
How do I know which rail I need?
By the width of the dovetail on your receiver: 11 mm or 16 mm.