Unfortunetly no. The Magazines are designed to fit in the same magazine well, and are the same length, but that's the only similarities. The .40 magazine has a reduced interal width due to indents that run throughout the length. The followers are different, and the lips are different. You can, however, buy a conversion kit so that your frame can be .45 and .40 capable. You would have to change out the top end and ejector when you wanted to change over.
Really interesting....Don't ya think??
I did some further checking on this and it seems Newton is correct in what he stated. I'm sorry for any confusion I may have caused. Thank you Newton for straightening this out.
Regards, Bob Hunter www.huntercustoms.com
[This message has been edited by Hunter Customs (edited 08-20-2001).]