Things I liked: The price is right, most places they're about $15. These kits are for b2's. The screws are the pivot for the break barrel. The little one is the lock screw. I've got 2 bam b3 ak's. They have 33 coil main springs. I counted the coils in this picture, 33. Haven' put'em back together yet, one 's away getting a Weaver rail. The spring guide's a little tight but molly will fix that. The ak's have leather seals like the kit. I soak'em in 30w non-det. oil for a better seal. Smokes a little but doesn't diesel. Things I would have changed:Cleaning rod is to flimzey. A solid one like the ones w/ IZH60/61's would be better. I usu. use a bore rope. I've heard the oil is not very good. (These guns aren't Fienwerkbau's) oil's oil. What others should know:I've bought these kits for b3's and qb57's. The one's for b3's have 37 coil springs about 9 1/2" long and come w/ a sear and sear spring and plastic piston and breach seals. The qb57 bull pup kits have 37 coil springs about 10 1/4" long and plastic seals. Anybody can hit target with Air Hawks, Silent Cats or RS2's. These chinese guns are easy to re-build, re-finish and fun to shoot. BUILD A SPRING COMPRESSER OR YOU'LL BREAK SOMETHING OR GET HURT!