HK SL8-4 vs 8-5

[Rubikahn]

I was wondering what the differences between the HK SL8-4, SL8-5 and SL 8
are? Or is there a difference?

 

[Hunter7]

The SL8-4 has the short flat top rail for scope mount and the SL8-5 has the long rail with open sights, other than that no difference. The SL8-1 is the model designated for the U.S. market and has the narrow single stack 10 shot magazine versus the 5 shot double stack mag of the 4 and 5 version. Also the bolt head is a little different on the SL8-1 to make it compatible with the single stack mag.