What is that?
That’s a Ruger 10/22 with a Muzzelite Bullpup Stock and drum magazine. It’s not mine, but that’s where I’d do if I ever go aftermarket.
I love the 10/22 second only to my Ruger 44 magnum carbine. The 44 is virtually the same configuration as the 10/22, but it is a bit heavier, has a tube magazine, and the barrel is “slightly” larger. If they made the 44 with a detachable magazine, it would simply be the best gun in the world.