See broken transfer bar in the FAQs, it's peened together, no screw. You can buy a new one from Brownell's, H&R may send you one if you ask, you'll have to completely R&R the frame to get to it tho, see Perklo's trigger hone info in the FAQs and go to his site to download the instructions, might as well do a trigger job while in there. The other option is to send it to H&R for repair.
Tim