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			Does the receiver have a base milled in?  The CZ 550 replaced the ZKK in America, but I think the scope mounting options are identical (not sure, pulling from memory of the CZ and other sources).  Some newer CZ's are identical to the older Brnos. 
 
I believe you can use pretty much an optic with a 1" (and likely 30mm tube) on the 600.  It's finding rings for the receiver that can be difficult. 
 
CZ, Burris and Talley all make rings to fit the CZ.  I recommend calling CZ and asking (although CZ only sells rings that are high in height).
		 
		
		
		
		
		
		
			
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