Older model Mossberg 500 ATP

jernbr · March 13, 2012, 11:01 AM

I recently acquired a really nice Mossberg 500 ATP. I have been looking for info on the history of this model shotgun. I called Mossberg and all they say is its an older model similar to the 500a. I am new to this site so ill post pics as soon as I figure this out...lol.

Btw does anyone know where I can find info on this rifle?

Lee Lapin · March 13, 2012, 11:12 AM

Rifle????

jernbr · March 13, 2012, 11:19 AM

oops .... i mean shotgun. You replied so do u happen to know anything?

TxGun · March 13, 2012, 11:57 AM

The "A" in Mossberg nomenclature has always designated 12 gauge ("B" = 20 gauge, etc.). The ATP is a 12 gauge Model 500 shotgun set up in a basic military/police configuration. As I recall, it was one of Mossberg's first guns dedicated to a service shotgun role....this was before the 590 series. Just a guess now: 12 gauge tactical police??? I had one at one time. Good shotgun...wouldn't mind having another.

You might try to contact Mossberg if you want a real definitive answer.

jernbr · March 13, 2012, 12:09 PM

Thank you for the info.

jernbr · March 13, 2012, 01:32 PM

Does anyone else have one? Got pics? Is it possible to change the magazine tube?

hogdogs · March 14, 2012, 09:16 AM

Mag tube should be threaded and screwed in...

May require stripping action and placing in oven to heat up any loctite used.

It is a thin material so care must be taken as to where and how to use vises or clamps...

Brent

jernbr · March 14, 2012, 12:47 PM

ty brent

PetahW · March 15, 2012, 06:13 PM

The 500ATP was Mossberg's version of what was referred to by most in the 1970's as a Riot Gun - short bbbl ( 18"-20", FC, front beaqd sight only - meant for buckshot.

The usual procedure was to fire a buckshot load into the pavement/ground, just in front of the rioters, so the load would pick up additional projectiles in the form of dirt/gravel/whathaveyou.

.

.

lamarw · March 15, 2012, 07:44 PM

I believe TXGun has the correct answer. I have one which was a former Alabama State Trooper gun. It has a 20in barrel and and 8 round magazine.

It was in relatively good condiiton when I bought it, and I sent the barrel to Mossberg for a $35.00 factory reblueing. Now, it looks like new. I use it as my primary home defense gun.

I also like the fact it has wood furniture.

DennisRL84 · March 15, 2012, 08:14 PM

I bought one about 5 yrs ago for only $125 in excellent condition.

It's an awesome gun!

gary.pick · August 6, 2014, 06:58 PM

Got this one from a guy who never fired it. Mint condition except for believe it or not the dang safety broke while in the box!

It has rifle sights and a smooth barrel. 7+1. The serial number starts with H. I sent email to Mossberg but no reply yet

March 13, 2012, 11:01 AM	#1
jernbr Junior Member Join Date: March 12, 2012 Location: SoCal Posts: 9	Older model Mossberg 500 ATP I recently acquired a really nice Mossberg 500 ATP. I have been looking for info on the history of this model shotgun. I called Mossberg and all they say is its an older model similar to the 500a. I am new to this site so ill post pics as soon as I figure this out...lol. Btw does anyone know where I can find info on this rifle?

March 13, 2012, 11:12 AM	#2
Lee Lapin Senior Member Join Date: September 7, 2004 Location: SE NC Posts: 1,239	Rifle???? __________________ Mindset - Skillset - Toolset. In that order! Attitude and skill will get you through times of no gear, better than gear will get you through times of no attitude and no skill.

March 13, 2012, 11:19 AM	#3
jernbr Junior Member Join Date: March 12, 2012 Location: SoCal Posts: 9	sorry...shotgun oops .... i mean shotgun. You replied so do u happen to know anything?

March 13, 2012, 12:09 PM	#5
jernbr Junior Member Join Date: March 12, 2012 Location: SoCal Posts: 9	Thank you... Thank you for the info.

March 13, 2012, 01:32 PM	#6
jernbr Junior Member Join Date: March 12, 2012 Location: SoCal Posts: 9	Does anyone else have one? Does anyone else have one? Got pics? Is it possible to change the magazine tube?

March 13, 2012, 11:57 AM	#4
TxGun Senior Member Join Date: April 14, 2008 Location: Family ranch - Central TX. Posts: 467	The "A" in Mossberg nomenclature has always designated 12 gauge ("B" = 20 gauge, etc.). The ATP is a 12 gauge Model 500 shotgun set up in a basic military/police configuration. As I recall, it was one of Mossberg's first guns dedicated to a service shotgun role....this was before the 590 series. Just a guess now: 12 gauge tactical police??? I had one at one time. Good shotgun...wouldn't mind having another. You might try to contact Mossberg if you want a real definitive answer.

March 14, 2012, 09:16 AM	#7
hogdogs Staff In Memoriam Join Date: October 31, 2007 Location: Western Florida panhandle Posts: 11,069	Mag tube should be threaded and screwed in... May require stripping action and placing in oven to heat up any loctite used. It is a thin material so care must be taken as to where and how to use vises or clamps... Brent

March 14, 2012, 12:47 PM	#8
jernbr Junior Member Join Date: March 12, 2012 Location: SoCal Posts: 9	ty ty brent

March 15, 2012, 06:13 PM	#9
PetahW Senior Member Join Date: September 19, 2008 Posts: 4,678	The 500ATP was Mossberg's version of what was referred to by most in the 1970's as a Riot Gun - short bbbl ( 18"-20", FC, front beaqd sight only - meant for buckshot. The usual procedure was to fire a buckshot load into the pavement/ground, just in front of the rioters, so the load would pick up additional projectiles in the form of dirt/gravel/whathaveyou. . .

March 15, 2012, 07:44 PM	#10
lamarw Senior Member Join Date: April 12, 2010 Location: Lake Martin, AL Posts: 3,311	I believe TXGun has the correct answer. I have one which was a former Alabama State Trooper gun. It has a 20in barrel and and 8 round magazine. It was in relatively good condiiton when I bought it, and I sent the barrel to Mossberg for a $35.00 factory reblueing. Now, it looks like new. I use it as my primary home defense gun. I also like the fact it has wood furniture.

March 15, 2012, 08:14 PM	#11
DennisRL84 Junior member Join Date: March 12, 2012 Posts: 32	I bought one about 5 yrs ago for only $125 in excellent condition. It's an awesome gun!