les, that's an awesome suggestion!
My first build was an Aero Precision lower (bought from a friend a few weeks before the 2016 election: my first stripped lower). I built it with a PSA parts kit, which included a KAK buffer tube and Shockwave Blade. I added a polished/plated trigger group for $30 on sale. I also bought a complete pistol upper with a 10.5" barrel from PSA and mounted a Magpul folding rear to go with the A2 front sight/gas block. It's really a great pistol and is about six feet away from me as a write this. Its only shortcomings: (1) while very compact, it still requires a fairly large bag for carry, (2) 5.56mm ammo prices limit how much I can shoot, and (3) this beast is LOUD!
I want to build a pistol that can reach out to 100 yards or so, can be carried around in a fairly small bag, is cheap enough to feed that I can afford to shoot it frequently, and is quiet enough that I can shoot at indoor ranges, as well as at my club before or after work without alarming neighbors in a subdivision that was recently built not too far away.
I like the idea of a folder that doesn't have a buffer running back and forth through it. The Hera SFU is solid, but that isn't a problem with a Charger receiver. It could be fired folded or open with no problem.
Another bonus of the .22 LR Charger is that non-enthusiasts like my wife aren't intimidated by .22 firearms. She doesn't like the noise of the AR pistol in 5.56mm, nor the feeling of the buffer running back and forth though the buffer tube against her cheek.
I'm wanting to get in much more practice than I've been getting, and I think I can do it with a .22 LR. I also have a lot of respect for the .22: if I had to defend myself out in the sticks somewhere with it, the Charger would be much better than nothing, and a good backup to my laser-gripped .357 Ruger (aging eyes make optics and lasers very attractive). I'm hoping just its appearance might cause someone to re-think their choices.
I've had a few run-ins with the dregs of humanity during my life and have drawn a gun twice, but never been forced to fire it. I'm hoping to avoid all future trouble, but I believe in the Boy Scout Motto.
Thanks again for a great suggestion. You are right: AR pistols rock!
Dirty Bob (Eagle Scout, 1980)