Which model is it? Pre-A, A, B, C, D, E.  The A and B's had a pretty simple trigger that's hard to adjust much below 3 lb. The C's and D's got the micro motion trigger and can be adjusted down under 2 pounds and is an excellent trigger. Later D models were re-designed so that they could go down to about 12-14 oz if you were careful when closing the bolt. Some of the E models came out with Karl Kenyon triggers which were excellent and could be adjusted down to just a couple of ounces. Rimfire Central has a forum on just the 52's and you can see different pictures there however our fine friend Photobucket, has a lot of them blocked.