I clean my HK45 every few hundred rounds. No special cleaning compared to other firearms. The o-ring will last a long time. I have not removed mine as of yet. Dont forget have a Heckler & Koch and a smile, its the real thing.
I clean my firearm after every session at the range. If you look around the forums you will find some great threads on cleaning and maintenance on firearms in general which can be super helpful. At the moment I use CLP but after browsing around the forum I have things to try like Weapon Shield and Frog Lube. Sorry for not getting real specific but that should get you started. Enjoy the new HK45!
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