Crosman C1K77 .177 cal pellet rifle

This rifle belongs to my neighbor across the street, Chuck, in Mount Dora, FL but I had the good fortune to tear it completely down because it had broken and we were just using one of my guns to shoot at toy soldiers in his Florida room.  It has a floating barrel but Chuck, thinking something was wrong, had filled in the spaces with gunk.  The problem was a complete loss of power.  I took out my Swiss army knife and when we got it completely taken apart, it was apparent that the main spring had broken.  I gathered up all the parts and took it over to my place when we were done shooting, so that I could look up some stuff on the internet.  When I did, I was amazed to find that I could order a replacement spring for five dollars from Crosman!  The problem was that I had had to take all of the slide mechanisms, the trigger assembly, and the spring retainer at the breech and when the part came, I broke the plastic cover over the breech container trying to compress it with a furniture tool.  That cost another three bucks.  Then I put the whole thing back together.  There was pressure on the spring when you broke the barrel to cock it, but it wouldn't click into the "stay cocked" mode.  I took it all apart again and had a devil of a time figuring out the trigger.  Moreover, I couldn't get a good diagram of the trigger on the internet anywhere.  I took apart the complicated little trigger mechanism and put it back together again, not seeing anything wrong.  I blocked on it for a long time and was going to give up and just take it back over to Chuck when it dawned on me that the trigger mechanism might not be close enough to the tang on the back of the piston that it was supposed to catch.  I fiddled and fiddled with it until I realized that part of the trigger mechanism slid under a groove on the receiver.  When I put it all together yet another time and cocked it, it clicked right into place!  There was a pellet in the chamber, of course, from Chuck having tried to shoot it, and I discharged that into the back fence, before taking the whole thing over to him in a frenzy of joy.  We shot for a couple of hours.  He was able to put the scope back on and get it sighted in pretty accurately.  It really is not a bad little rifle for being inexpensive.