The following are PDF files of user manuals for closed-bolt rifles. Choose the file for the correct operating group of your rifle; contact us if you have questions of which operating group your rifle contains.
- Mk1 Operating Group - discontinued operating group; contact us for an updated operating group.
- Mk2 Operating Group - single-piece slide-carrier, with aluminum bushing.
- Mk3 Operating Group - two-piece slide & carrier, with operating rod set screw.
- Mk4 Operating Group - newest operating group, in all rifles shipped after Feb 2015.