I bought a Mossberg 500 #50521 a couple weeks ago after I went to the store only to find out that they sold their only 590A1 the night before. That said, I looked at the 870 Tac and the Mossberg 500 and like the Mossy better. The weapon is great and shoots very well. The gunsmith there didn't like the new style pinned slide action but said he has never had one come in for repair. Has anyone heard of the newer slide action breaking? Tim