The bolt comes apart in about 10 seconds ! No excuse for not cleaning it ! My M1 90 has a black plastic stock [one of the first on the market ]and yes in those days it was sold by H&K. I modified mine to work with target loads easier. I also dropped the trigger pull from 8.5 lbs to a much nicer 5 lbs.Another great improvement - I removed the fiber optic front sight and replaced the fiber with stainless steel.The fiber optic sights I think are terrible as they give a different sight picture whether you're in the sun or shade. Popular but terrible !
And Watson , bring your revolver !