Welcome to the forum 'shaggybull'.  If you can post some pictures of your Krag, you will get more complete information.  It appears you have a Model 1898 U.S. Infantry rifle that was probably assembled in early 1901.  The stock is probably not original to that rifle, but was put on during a re-build after 1908 at Benicia Arsenal (B.A.).  The stamp you cannot make out is probably a stylized 'JSA' 1903 (J.S. Adams).  This is commonly called an acceptance cartouche and indicates when a completed arm was accepted into service.  These early markings were not removed when a stock was recycled. 
  If your stock goes all the way to the muzzle, someone (not the arsenal) has cut off some barrel length.  A Krag rifle barrel is 30 inches long and a carbine barrel is 22 inches long (measured from muzzle to closed bolt face).
  (Attached photo shows muzzle area of Model 1898 rifle).