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Can anyone tell me what the screws marked 1,2 and 3 in the photo do? ThanksChuckb, you might find the attached metric "cheat sheet" could come in handy when hunting for Sako screws/nuts.
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Many thanks for your help.I have posted a new threadI'm not familiar with this trigger even though I have three P72/M78 rifles as there were apparently three different triggers used on this model, which seems odd for a rifle produced in relatively low numbers. However, screw No. 1 is definitely the mounting screw and should be tight and locked with the nut. Screw No. 2 appears to be the trigger sear engagement adjustment; and screw No. 3 appears to be the bolt sear engagement adjustment. Adjusting either sear engagement (particularly the trigger sear) can be tricky and should be left to a competent professional.