I have always wanted a Krag and recently acquired 2 rifles .  Being new I did not know what i was buying.  One is chambered in something around 24 cal.  The year 1918 is stamped on the receiver and the ser # is 19812.  It has a hole in front of the trigger guard.  The stock is short civilian looking and there is a screw that attaches the  stock at the front of the receiver.  What do I have?  The 2nd Krag is a US springfield model, it had a brass device added that prevented rounds from being loaded through the magazine.  This device was held in by a single screw through the side plate and is counter sunk  appears to be professionally installed.   Looking for help.