Hello, I was hoping to get some help here to ID my Krag Rifle/Carbine.  This R/C has been sporterized and is in very non-original configeration.  It is not stamped on the receiver with any markings.  The only number is on the left side of the barrel near the receiver.  It is marked as 3XXX.  The barrel is about 22" but I suspect it is a shortened rifle and the front and rear sights have been changed(redfield peep).  It has no handguard and the butt plate was replaced.  There is no rod channel under the barrel but I suspect the stock was replaced.  Barrel band has an 'U' on it left side, facing the rear.  Any ideas?   The receiver and barrel look 'rough' like they were not finished well or were turned on a lathe.(normal?).  There are two filled screw holes in the top of the barrel.  Thanks, Lorren