I clean my duck gun after about 30 rounds. Experience has indicated to me that this will prevent any problems.
I pull the barrel off and clean the bore. Pull the choke out and clean both sets of threads. Pull the bolt and the trigger assembly out, dunk them in a can of WD40, then brush them clean and blow them off/out with 120psi shop air. Then, flush them in a solvent parts cleaner, blow them dry with 120psi shop air. Dous them with RemOil, then blow the oil off/out with shop air.
Spray the inside of the receiver with WD-40, blow it out with shop air. Put a drop of RemOil on each bolt groove in the receiver. Re-assemble. Polish the carbon deposits off the magazine tube and scrub the piston.
At the end of the season, I do all the above but also remove the magazine spring and follower and clean the inside of the magazine tube and the spring and follower. Lightly lube with RemOil and re-assemble. Remove stock and recoil spring. Clean and lube the inside of the recoil spring tube, the spring, and the follower. Reassemble.
While everything is apart for cleaning, I inspect for worn or broken parts, especially the buffers.
About every 5 years I replace the O-ring, whether it needs it or not.
Last edited by mudpack
on Sat Dec 28, 2013 7:51 am, edited 1 time in total.