Try searching at sites like gunbroker. Also, you might check with the guys on the 1911 forum, although it seems like some of those guys are on this sight as well.

 

The barrel in my gun is marked 7791193 and I think this a replacement barrel. When I get the correct barrel should I keep or sell this barrel?

 

I haven't priced a GI 1911 barrel lately; what are they going for? My own inclination would be to keep the barrel you have got; presumably it was armorer-fitted and is part of the genuine history of the gun, and is a GI part. Another replacement barrel is still just that; a replacement.
Understand your desire to make it 'right' but it's one of those calls you have to make when, arguably, 'restoring' your gun.
Moon

 

No armorer ever fitted a barrel to the standard Service Pistol - they were designed to be a drop-in part, and worked admirably when considering the loose tolerances.

 

I have a Flannery bbl. According to Clawson's book the Flannery were allotted to Remington and Ithaca in 1944 -45.
So if your Remington was built in that time it will be correct.

Really good condition,strong rifling , lugs on top are not worn, has an F stamp on the right & a P on the left. no link or pin 100 bucks shipped

 

Now that is a good price!
Bob

 

I think my gun was made in 1943 serial# is 13120xx. Would a flannery barrel be correct?

 

No. High Standard would be '43.
Bob

 

Well, okay, an armorer dropped it in, then! Didn't realize that they were that forgiving (isn't there an issue with the length of the link; with it available in three or four different lengths to correctly engage the lugs?)
Moon

 

No - that's only for the National Match barrel fitting - done at Springfield Armory and Rock Island Arsenal for GI pistols.

Service pistols had a certain amount of looseness to counteract mud and dirt.

National Match pistols were very well-fitted - outshooting pretty much every Colt Gold Cup I ever saw, unless someone had rebuilt it to actually 'compete'.

 

What has always amazed me is how good the triggers have been on every GI 1911 I've ever handled; crisp, reasonably light and creep free.
Better than older Colt production, IMHO, tho' the current stuff seems much improved.
Moon
ETA-
Dogface, I won't argue the point; you may well me correct. I have this mental image of a 1911 armorer's manual with intstructions for fitting links for ordinary 1911s, but there is a lot of stuff I don't remember half as well as I once did.
M