Would also recommend sticking with factory 20-round mags if you can.
You'll see a lot of posts about replacing the gas bushing with a smaller one. You may or may not need to do that. Mine ejects between 1 and 4 feet - right on the edge of reliability some would say, and it is the original one. The newer Minis usually need them.
1911 buffers are a good idea in any event. Plenty of posts on those here. Inexpensive, simple to install, and really cut down on metal-to-metal beating of the op rod as it cycles.
And remember: "pictures, or it didn't happen".
Here's mine, with a new factory wooden stock. It is a GB (government bayonet) model, with an Accustrut I fashioned from an old piece of grounding rod I carved out to clear the bayonet lug (didn't want to grind out the original strut). A typical AccuStrut (or Mo-Rod, or Trueshot) stabilizer does the same thing.
If you go that route with a strut, go with a two-clamp 6" long version for best results. Without one, once the 181's "pencil" barrel heats up, it will start slings rounds hither and yon. The struts pretty much fix that.
Enjoy, and keep us posted!