Schultz and Larsen M70

[CleverUsername]

I recently (past day) got a Schultz and Larsen Otterup M70 rifle. I really like the gun, I haven't gotten to shoot it yet, but I think I'm going to tomorrow. After doing a little research I found out that the later version of the rifle, the M77, have an improved, more adjustable trigger. Is it possible to add this to my rifle? Also, there are a bunch of Vabeneftersyn (Vaben Eftersyn) stickers, all stuck one-on-top-of-the-other, the newest is an '01 and the latest is a 1989 (that I can see). I WAS thinking that it was a shooting competition, but I entered it into Google Translate (as Vaben Eftersyn, with the space) and that means Gun Inspection in Danish. Any information would be helpful. The photo is NOT of my gun, it IS, however the same model.

Schultz and Larsen Otterup 22LR.jpg (3.46 KiB) Viewed 1267 times

Thanks