I would think that the marushin can handle regular use. I know for sure the ACM cant even handle that. Breakage within 5 pumps on some that i've seen XD. Also those .2 gram bb's would have 0 accuracy in the version im looking at getting. 8MM classic. I dont see many people running around with those. I'ts really a shame not many companies produce good, interesting, or innovative shotguns. I want more gas propelled multi shots or shell ejectors on the market.