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HGD,
In reply to your PM. Your shotgun was made in 1952 (D barrel date code), there are no choke markings on it so it likely had a factory polychoke but on a 28” barrel (the only length offered on...

Carbine Joe,
As others have said definitely not original. I'd be very interested to know the serial number of this 520-30 and if it is all matching (barrel, receiver/trigger tang, stock) for my...

Gene,
The finish on that gun is very nice, it is a shame that someone cut down the barrel. Yes, that was a long-barreled training gun (four asterisks ****) originally. Further proof is that the...

Gene,
If the barrel has four asterisks then it was originally a long-barreled training gun that has been cut down. Someone has gone the extra step of reattaching the original ramp sight to make it...

Gene,
The key to an M720 is determining if its a riot gun or a long barreled training gun that has been cut down. An original riot gun will have barrel choke marks (three astericks *** for...

JJM,
Very interesting. I wonder how that accounts for the mix of "P" "P." and "." marks that appear throughout this range. I know that Stevens used the "P" stamps on the tops of the barrels and...

JJM,
Model 520s and 620s do like to crack around the locking lug. It sounds like you've got a wealth of knowledge passed along from your Stevens Arms Co friends (verbal and documents). You need to...

Tom,
I have yet to find reproof marks in 68000 range on M520-30s, but will keep an eye out for them. I find them most frequently on the post-war guns in the 70000 range (Model 520A) and upper 30000...

Here is an example of a unmarked Stevens 520A from the period (with the just the standard roll marked barrel proof) to show the open canvas available for...

Tranham,
It is my theory that Stevens made more shotguns then were required by the military contract. I believe this because of the appearance of the re-proof "P" stamps that are found on the tops...

Tranham,
The serial number puts it in 1942 if I had to guess. Canfield's M520-30 range is 38000-70000 and that started in spring 1942 and was done by June 1944. The M520-30 is just the military...

Tranham,
I collect and research these shotguns. The shotgun above and the one on your other post do not have typical M520-30 markings. Canfield lays out the serial number range as 38000-70000. ...

Scratch that, I misspoke, some did...and had Cutts compensators added. Doesn't change the fact that this gun is fishy.

Hello,
This serial number is under the Bruce Canfield accepted starting point for 520-30 production (38000). However all the markings are correct in placement, size and font for a military shotgun....

Hello,
A very nice original example! It's in the first half of the second production block so the non "S" marked bayonet lug/heat shield is probably correct. Easily $3000-$3500.

Hello,
I'm new to MILSURPS but I'm a Stevens 520/620 collector and researcher. I've watched this shotgun on Gun Broker for a number of months and it looks like it is about to sell for $750. The...