Short and stumpy, preferrably a gas-sham. The lack of mechanical advantage means the extra effort allows one to be hit in the face, break the stock AND possibly get your fingers/web of the hand pinched or crushed in the breech when it 'kangaroos' the unfortunate shooter. The scope should be destroyed when the brute hits the ground scope-down in accordance with Murphy's Law.
A HW35 Export with its nice long lever is perfectly controllable.