Jmoore, what's the significance of a welded charger bridge? I'm mainly into MkIII's, and have not owned a great deal of No 4s. Any ideas as to the 4s stamped all over the receiver? This rifle has a DC prefix, but darned if I can see the A suffix you are seeing, your eyes are obviously better than mine! Another interesting note, the mag has an SMC marked follower, Singer obviously, but have only seen that mark on peddle schemes. Not that someone couldn't have put that in as a replacement. Rather glossy black paint on it, with olive drab paint below it. Thanks for looking!