Why not allow each member of this "small group" to get their own firearms?
This is by far the safest and most legal course of action. Legal possession of firearms by someone other than the owner/4473 filler can be a touchy subject. And when you start bringing "small groups of armed rural people" into play, it makes those with badges antsy and start looking for errors and screwups.
Not to mention, personal ownership of firearms is just better. They're always there when you need them, they're yours to take care of and modify if you want. You can shoot them as long as you want. If you're serious about this small AND LEGAL group, just get together and all decide on one common pistol and rifle to purchase, then go by your own separately.
And take extra special care to follow all applicable local, state, and federal laws to the letter. Three letter agencies love to pick on "small rural groups". Be careful. Very careful. If you're already part of some sort of militia I can
promise there is already a file on your group in some Law Enforcement agencies cabinet. Cops track militias like they track gangs. Hate that fact all you want, but it's still true. So just make extra extra extra careful that you're following ALL laws. If you even start feeling for a moment anything resembling a "we're a small group out in the woods, no one will notice" mindset...STOP. Recheck the laws. Recheck whether you're following them. If any of your militia members start talking, posting, writing, etc about anything violent, illegal, hateful, racist, etc
kick them out. Again, thee letter agencies put groups like yours under the microscope and they don't stop till they find something.