Hi Dan, from the Henry website
" The Homesteader is available as three different models to cater to your 9mm magazine preferences right out of the box thanks to its interchangeable magazine well, providing compatibility for Glock®, SIG Sauer®, and Smith & Wesson® M&P® magazines. No matter which version you choose, a Henry 5-round and 10-round magazine are included in every box to get you up and running."
So choose the the model that fits your needs.
H027-H9 includes Henry 5 & 10 rd magazines
H027-H9G includes 5-round and 10-round Henry magazines. Glock® magazine well adapter included (Glock® magazines not included).
H027-H9S includes 5-round and 10-round Henry magazines included. SIG®/S&W® magazine well adapter included (SIG®/S&W® magazines not included).
Stay safe & have a great day!

Hi Dan and welcome. As you stated, the models will use Glock, S&W or Sig P320 Magazines with the appropriate adapter and will run with the supplied Henry Magazines out the box. Just choose the model you prefer adapter/magazine wise. Cheers and stay safe!

Dan, depends wich version you get. Model number H027-H9G comes with a Glock magazine adapter. So it can use Henry style mags or Glock. Model number H027-H9S includes SIG®/S&W® magazine well adapter and will accept SIG P320 mags, and S&W M&P mags. The standard model H027-H9 doesn't include any adapter and specifically uses Henry branded mags. All models can use and include 1-5rd Henry style magazine and 1-10rd Henry magazine. Hope this helps.