.22 LR Rapid Fire with the Winchester Wildcat and Custom 10/22 Gun 

It's been relatively reliable, but the groupings can be sporadic based on the ammo. If I was looking at a 22 as a backup gun, I would try for a Ruger 10/22. A lot more options for modifications down the line, and spare parts are everywhere!

@@SuLuOutdoors I believe 10/22s are supposed to be 7 to 8 pounds? I do have an HK MP5 and that weighs 7+. It's good, but not for maneuvering, it's bulky and sort of heavy. I plan to go as light as possible.

@@mikem.2078 Ah gotcha, the wildcat is definitely lighter than the Ruger 10/22. A good one to consider for what you want then!

@@SuLuOutdoors Hey, since you mentioned the 10/22, I'm looking specifically at the 10/22 "Takedown", which might have what I want. However, I don't know whether the Takedown version is as modifiable, especially the rear stock part. Any idea? I prefer "pistol grip" not the sloping kind. Do you think the Takedown has aftermarket pistol grips? (That's the only part I'd want to modify, don't care about everything else, front grip, etc).

@mikem.2078 I think you're right with the Takedown not being as modifiable, but it does look like you can change out the stock and grip specifically. Let us know what you end up going with! The Takedown looks like a sweet setup 👌