what would you ask gun mfg to build
Colt 1911 long slide. with barrels in 10mm and barrel in 9x25 dillon, a barrel in .22TCM with 10mm magazine base designed to hold the .22TCM and feed from the 10mm frame, a Slide for 9mm fitted to the 10mm frame allowing longer heavier bullets up to 55 grain in gun.
Also a 38Super barrel fitted to the frame and slide.
Also a .40 barrel fitted to the 10mm Colt.
So one frame, two slides,five barrels, two magazines for one frame.
Then maybe the 10mm slide and frame with a higher capacity cartridge base o on the .280 necked down to .22 allowing more powder capacity behind the .2 45 and 55 grain and 62 grain bullets and 2500+ fps possible from the the 1911 10mm frame and slide.
And without studying the dimensions, maybe a fit the 7.62x25 hot rod in a 1911. Might want a bigger link and pin, and maybe a bit of change in dimension aimed toward strength.
Like S&W did with the Hi Power design for 10mm.
Conceivably one frame could accomodate all of them with the magazine being the differences along with a barrl and spring package.
Second the .357maximum/.357magnum/.38 chamber in the Henry or other carbines. The shell lifter would not need changing I think but maby a chnge in the magazine shell stop.
Do the same thing with .460/.454Casull/.45Colt carbine.
and then the .44 calibers.
Would be simple to do and multiply sales of the carbines and ammo.
A .460 carbine, I know of only one very high priced, I saw in a magazine.
Precludes most people buying it.
Many want more velocity of the big magnums and new bullet designs, and with polymer tips keep them from going off in the magazine.