it is not tha difficult. Unless the instructions have vague colors like gray,blue,green etc.
then got search for refs, although instruction like that imply a really crap kit (but not always, sometimes 10% it is a result of poor English, (worse than mine..?!) like the early Academy and now Kangam kits.
FS, RLM or otherwise coding should be obligatory or else let the Mossberg sing....lol