My TRP should is shipping to my FFL today and I'm going to buy some aftermarket mags and wanted you opinions on which ones to buy, specifically which ones have worked well in your TRP. Looking for the extra mags for a couple reasons, one being IDPA shoots, the other being that I'm looking at 3 10-round mags for home defense/extra capacity (1 in gun, 1 10-round mag in each vehicle glove box). Couple of questions I had regarding additional magazines: 1) What's the difference between 7 and 8 round magazines, other than holding the extra round? They look pretty close to identical in size to me. Any preference in one vs. the other one? 2) Are the SA factory mags (I can get them for cheap with the Loaded Coupon) any lesser quality than CMC or Wilson Combat? Those are the 3 brands I was looking at getting and was wondering if the extra money (2x as much) for the WC or CMC mags worth it? 3) Whats up with the base plates/slam pads? Do they help that much? I noticed the SA aftermarket mags look like they come without the base plates is why I'm asking. Didn't know if it mattered, with the TRP having the wide mouth mag well. Thanks... Wanna kill these ads? We can help!