Ruger LC9
7+1 9mm Hammer Fired pistol. Here you can see it's comparison to a LCP.
I think hammer fired thing's a wash--I'd want hammer fired to put my thumb on when reholstering (to prevent AD)--doesn't look like it's an external hammer.
Ruger LC9 Centerfire Pistol
Hk 416C
http://www.heckler-koch.com/media/Ne...V004.11.10.pdf
Heckler & Koch - USA
Like the well known HK 416/piston operated AR except they tinkered with the buffer tube and bolt carrier, resulting in a super shorty AR15 style rifle. Colt had a similar Short-Compact-Weapon ("SCW"--AR15 with folding stock) but I never really heard or saw much about it. No details on availability.
Had this concept in my head a couple of years ago--glad someone acted on it.