If anyone is looking at the Glock 43, look at the Walther PPS.  Not PPK, PPS.  It is a single stack, striker fired pistol.  You can get them either in 40 or 9mm.  With one in the chamber and the finger tip extended magazine it holds 7 (40 SW).  The flush fit is 6, including one in the chamber.  It is super slim and easy to carry.  Like any gun other than a Glock, SW or Sig, holsters can be difficult to find, but Milt Sparks makes several to fit.  
It is super accurate, has multiple back straps, and points on target perfectly. Walther does a horrible job of marketing them and they should be more popular. I've had mine for 6 years and have shot everything from Winchester "white box" paper punching ammo to my full power duty ammo (Federal 180 Gr HST load) and it eats it all without a hitch.
				
			It is super accurate, has multiple back straps, and points on target perfectly. Walther does a horrible job of marketing them and they should be more popular. I've had mine for 6 years and have shot everything from Winchester "white box" paper punching ammo to my full power duty ammo (Federal 180 Gr HST load) and it eats it all without a hitch.
	
	