i recently received a 22/45 from my uncle. i fired a few magazines when i first got it, then i went home. i stripped it for cleaning, following the instructions exactly. i had a little trouble reassembling it and now that i've finally got it together, the bolt sticks when drawn back. i can tap it and it will fly forward, but then the hammer will not fall after several trigger pulls (at least i think it hasn't because i can still put on the safety). i don't think it's a lubrication problem but i'm not sure. i haven't been able to fire it again, so i'm not sure what it will do then. can anyone help?