People have been raving about the Shield Arms 15 round magazines they created for the 48 and 43X. This thread isn’t about that. It’s about the hints that they are producing a mag for the 43 and will increase its capacity, but not length, by using a metal body. OEM base mags are 6 rounds. There are many aftermarket extensions, some better than others, that will add a +1 without adding anymore length than the empty pinky extension Glock gave us on one of the OEM base mags. I sat down and drew an outline and looked at what fits and how it fits in the OEM mag. After doing so I think I came up with an answer as to why we have not see a mag from Shield Arms for the 43: there just isn’t that much to gain in a 43. 48’s and 43X’s have a bit of a wider mag and I think that helps get those extra 5 rounds in there. Based on what I penciled out in my half assed scientific approach, they could only fit one more round in a metal flush mag. If they added a bit of an extension similar to what Pearce and Precious Seers (TTI) produce, they could get 8. This requires buying their mags plus changing out the mag release to be kosher with the metal mags. We have the average Glock 43 user. He looks at the options and this is what he sees: Shield Arms with their metal mags, metal mag release, and non OEM parts ($$$ + unkown reliability) to get maybe 8 rounds. He looks a bit further and sees he can use his Glock as is, use OEM mags, change out a base plate for $10 and get 7 rounds (OEM reliability + $). I have an educated guess most people are gonna take the latter option there. If you’re worried about capacity, the 43 isn’t your bag to begin with, it’s a non-issue. Shield Arms will have a tough sell in the 43 market. That’s why I am speculating we haven’t seen anything from them for the 43, the juice ain’t worth the squeeze because there’s not much juice in the fruit to begin with!