Mossberg 500 ATP...what's different than the plain 500?


July 23, 2009, 02:17 PM
So I've had my 500ATP for years now and it's a great gun. However, I never found out what the difference was between the standard Mossberg 500 and th 500ATP I have. Anybody know what's the story on the ATP models?

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July 23, 2009, 10:58 PM
Just by looking at it, it appears that you have a blade and notch side versus a more normal bead sight or a ghost ring sight. Also looks like its a 8 shot model with a 22" or 24" barrel. My M500 "Cruiser/Patroller" is a 20" 7-shot with a bead sight, in OEM configuration. I would anticipate that the guts are the same as any other M500 shotgun.

July 24, 2009, 02:08 AM
The ATP was the original Mossy military and police shotgun. It came with blade sights, mil-spec oiled wood, and a 7 shot tube. It was the mil/police gun before the 590 and the 590a1 came about. Today, it's identical to a 7 shot Persuader with rifle sights. The gun wasn't very popular due to the flat that time, quality was judged by the shine....but today, it's sought after.


June 6, 2010, 10:43 AM
just got myself one for 250$...

looks like I made a good deal !

August 18, 2010, 03:52 PM
There's also a matte aluminum finish with black (polymer vs. plastic) trim/handguard and stock with an 18" barrel. The one I'm looking at appears to have been made in Canada and imported by CAI.

August 19, 2010, 12:55 PM
I have an ATP as well, but it has a 5 shot tube and a bead sight. Barrel is 18.5 I think. Is this a frankengun, or did they actually make them this way too?

August 19, 2010, 04:17 PM
forindooruseonly: Mine is the same. From my armchair research and the guy I bought it from, there was this variation. Knowing Mossberg's history, they have dizzying variations of the same product.

reckless carolinian
August 20, 2010, 12:27 PM
Mine is a 5 shot, but only marked 500AT. Same furniture as pictured above. Got her for a song.

August 20, 2010, 02:34 PM
I have a 500AB...18 1/2" cylinder bore barrel...stamped "police gun" with the same stocks as OP, but with a bead sight. I got it quite a few years back, from a place in Sacramento that had acquired a complete lot of trade-ins from a L.E. agency. I later purchased a set of "pacs", pistol grip and forend. Over the years I have added a rifled barrel, and many other accessories, and have hunted numerous species of game animals with it. Great slug gun, and it's never failed me. Out of the many choices she has, it's the one my wife will go to if ever there is a need at home...I now keep it set up for just that purpose...Didn't get it for a song, but the $100 price tag caused me to sing a little...Great gun...enjoy!

August 21, 2010, 11:44 AM
I picked up an older Western Field 500ABD or ADB some blend of these 3 letters and got it for under $150,00 out the door.
Research told me it's a Mossberg 500 and it looks identical to the one pictured except that maybe the foreend slide is slightly different.
Sure it's older but not too old and is in great shape. A little heavy but that's OK. I plan to get the security kit from Brownells for around $150 that comes with a shorter barrel and extends the round capacity to 8 counting a chambered shell. They market it as an 8 round capacity but the mag tube only holds 7.

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