Hello jeepgal. I was going to advise you getting the HK p30 then I re-read your post. You have one. I think you are referring to the long length of the slide lock..or is slide release "-). They do make a P30S It is totally ambi. Mag release, de-cocker..same place next to hammer and the slide lock on right side of the gun.
I have recently bought a FNX9 which is totally ambi. Mag release, safety and slide lock on both sides of the gun.
As a lefty I do like using my left hand index (pointer) finger for the mag release.
Hope this helps all my fellow lefties out there.
BTW Stag Arms make left handed ARs Also the Beretta CX4 Storm carbine can be changed to a left handed model by anyone.
+1 on the Charter Arms Southpaw. 1911's were made to shoot left-handed. They were made for horse cavalry, who hold the reins in their right hand. With the addition of an ambi-safety you are good to go. All the other controls can be easily operated by the trigger finger.
Actually, you have the cavalry thing backwards. The reins go in the LEFT (or BRIDLE hand as it is known in the early manuals of arms) hand. You steer with the left and fight with the right.
And if the 1911 was made to be used left handed, John Moses would have put the safety where a lefty could manipulate it AND the brass wouldn't be kicking out to the right across the shooter's face and body, it would be kicking to the LEFT away from the shooter. Browning wasn't a dummy and he never did anything half way.
Don't confuse the coincidental way the controls can be worked with the trigger finger when held in the left hand with intent of design. When in the right hand, there is less (if any) shifting of the grip to work the controls. Lefties just have learned to 'make do' better than right handers imagined we would.