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Old September 18, 2012, 08:58 PM   #15
Aguila Blanca
Senior Member
Join Date: September 25, 2008
Location: CONUS
Posts: 7,524
Originally Posted by Bob Hunter
I'll have to respectfully disagree with the above statement.
Frames are different between calibers, the frame ramps are cut diffferent in angle and depth.
Bob, I have read this, but I don't think it applies across the board. I have an Armscor slide and somebody's 9mm barrel that I've slapped onto several different .45 Auto receivers with just a change of ejector and it has worked fine on all of them. And I know Colt used to sell multi-caliber pistol sets, with one receiver and two or three slides, barrels and recoil springs.

On the other hand, I know Gary Smith at Caspian says their 9mm frames have a different ramp, and that may be the case. What I found curiously fascinating is that the last frame I bought from Caspian is a "9mm" frame, but it will NOT work with a Caspian 9mm/.38 Super slide and either a 9mm barrel or a .38 Super barrel. The lip of the barrel ramp overhangs the frame feed ramp. Yet when I install the slide/barrel assembly from a Colt M1991A1 in .45 Auto, everything lines up and the pistol functions flawlessly.

There may indeed be a minute difference, but tat clearly doesn't guarantee either that a given receiver will work with a given caliber ... or that it won't.
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