Wilson Combat makes a wide range of products from 1911 Handguns to AR15’s. They seem to be geared towards more advanced firearms focused on accuracy. There are a great many fit differences between 1911 styles and AR15 as well as shotguns. There are many new advancements in firearm designs and what a 1911 was 100 years ago is not what a 1911 is today. metallurgy, gun lubrication and polymer have increase reliability dramatically. Polymer magazines and firearms are the future but there are still simple designs in Wilson Combat Magazines that give them viability for a long time to come.
I feel that many 45acp handguns usually balance out around 8-10rds and after that, they become too heavy. It’s all about what your feel and tolerances are, but the 1911 feels balanced in that capacity range. Some Wilson Combat Magazines are primarily meant for competition shooting and I still only hear about Wilson Combat when it comes to extended 1911 magazines. There are 9mm magazines also available and are often the fastest magazines to sell out. There are also a lot of newer CCW 1911 models specifically for concealment. The 1911 is still one of the most tinkered with firearms, probable only 2nd to the AR15, but I strongly suggest Wilson Combat Triggers, Springs and Slide Releases for your handgun.