I might pick up a new SG next month but I can't decide between the AIP Tac. 870 or a Mossberg 590a1. I like the idea that the AIP is a custom gun but I read where it is very hard to fix the ejector spring on an 870. However with a Mossberg it just screws in. Also I don't really care for the shell lift on the 870 either. With all that said I have had QC issues with Mossberg before. With the AIP 870 I know it is built with way better QC standards. So if you were me what would you do? The price for the 870 is $460 + some extra cost = $550. I can get the Mossberg for $475 total.