I am thinking about a HD 870 pump. I don't shoot a pump. Have always shot O/U and autos. Having said that, I have two pumps, a Mod 42 Winchester and a Mod 12 Winchester. But I don't want to cut off their barrels. I looked at a friends 870 and to chamber a round you have to depress a slide release on the front LEFT side of the trigger guard. On both of my Winchesters the release is on the Right rear of the guard. Is this normal with the 870? It is very awkard to me. Is a Mossberg 500 on the left or right and front or rear. Also, my Winchesters are 20 ga and 410, another reason I need another pump. Thanks for your answers