Just curious AFAIK M1 is Inertia and M4 is gas. Which one has more muzzle flip and recoil?
Looking to buy a HK M1S90 for 3gun, but M2 is readily avail. but have a legality question of what is legal for tube extension.
Not had much experience with anything more than 3 shot. Always used shotguns for upland game.
Any comments?
Looking to buy a HK M1S90 for 3gun, but M2 is readily avail. but have a legality question of what is legal for tube extension.
Not had much experience with anything more than 3 shot. Always used shotguns for upland game.
Any comments?


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