Ramped barrel question

[GSonnen]

I'm new to 1911 customizing. I've noticed in many parts catalogs, barrels are sold 'ramped' and 'unramped'. What is the difference?

Thanks for your help,

Greg
Rockwall, Texas

[wichaka]

The original design of the 1911 was using the frame as the ramp for the round to enter the chamber. Now some barrel & frame makers have the ramp as part of the barrel, which means that the frame must be able to accept a ramped barrel.