impossible
Yes, if you replace the upper receiver.
Any 30 caliber cartridge is equivalent to 7 mm.
If you want to go to jail and risk death or serious injury
No. Air pistols are not designed to withstand the pressure generated by gunpowder.
Probably, but it is simple enough that anyone can do the math without much trouble. Keep in mind that the only difference is the measurement system used (inches versus millimeters). One inch equals 25.4 millimeters. So, take the number of millimeters and divide by 25.4 (the number of millimeters in an inch). That's all. To convert back to millimeters, just multiply by 25.4.
No such thing. You can have small caliber but not low caliber.
the are also chambered for the 38 caliber, 9mm caliber and 22 caliber
What caliber of man are you looking for? What caliber of gun are you looking for?
.45 caliber
.32 caliber
30 caliber