What in your opinion is the best model Trench Gun? I personally like the Ithica 37 Trench Gun, that or the Stevens Model Trench Gun. Ive also seen that the Mossberg 590a1 is styled almost like a Trech Gun with the ability to attach a bayonet. Im new with shotguns, so forgive me if I seem unintelligent in this field (I figure i could learn more by asking questions anyway right?) Also, what is the point of slam firing? I know the Winchester Model 1897 Trench Gun and the Ithica 37 can both slam fire, but what is the point? Any help is greatly appreciated, thanks!