i have an 1898 30-40 krag with serial number 375873.  it has the stylized "p" behind the trigger guard and the letters sa or s4 (cant make the second letter out sorry) stamped above that.  the front sight is molded into the barrel and the length of the barrel is 22".  there is no l.j.a. on the left hand side of the gun or a year.  it has a rear elevation sight but not like any i have seen (doesn't have windage). 

i inherited this from my grandfather and i was just wanting as much info as i can get on it.  the gun overall is very nice.  stock is in good shape other than missing the wood peice on top of the barrel. the bore is good and the bolt is like butter.  no rust, no dings, im gonna keep it a while hahaha

Sorry I meant to put onto not into the barrel. I will post pics later 

Well, with that serial number, it is NOT an original carbine, even if the barrel length is 22". Also, the front sight appears to be located further back from the muzzle than is correct for a real carbine barrel, so I suspect it was cut. Does the muzzle have a proper rounded crown? Also, the stock appears to be a modified rifle stock. Should be a real fun shooter though.

Thanks guys. The end of the barrel is straight. No crown. Also thank you for the info on the sights.