mossberg 500as not acting right - The Firearms Forum

oldmedik · 12-27-2011, 06:58 PM

hi guys i picked up a mossberg 500as with24 inch ported barrel and removable chokes. the problem is every now and then, it doesnt want to let you chamber a new round after firing. no regular pattern, just when it decides. you have to really pump it, to get it to work, then it ejects empty, and fresh shell. any ideas would be appreciated.

Helix_FR · 12-27-2011, 07:28 PM

cartridge stop is not fully moving away from the rim of the next shell. If you action the gun upside down while looking through the loading port, you could probably see which one is not moving enough.

oldmedik · 12-28-2011, 07:28 AM

thank you sir, i will look at this. is it possible for one of them to b upside down, i did a complete teardown and clean prior to shooting it. may have gotten dyslexic for amoment.

Helix_FR · 12-28-2011, 08:24 AM

Nope, they only go in one way. The one that is causing the issues is the thicker flat one that has no pivot pin.

Country101 · 12-31-2011, 02:07 PM

I think Helix is dead on. I recently had a friend have the same issue. When unloading or shooting several, it would eject the fresh round out of the bottom after ejecting the spent hull. I thought this was the problem and advised him to order a new set of bars. They arent very expensive(maybe $12 if I remember right. My memory is bad though.) He called mossberg and told them the issue. They asked for his serial number and then his address. A week or two later he had a new set, free of charge. We have been out shooting since with no issues.

Helix, I'm having a problem with my old revalation. Havent looked at it yet, so it may be simple, but after I shoot the first round When I pull the trigger on the next I hear a click and no boom. I have found that messing with the safety seems to release somethin and I hear another, quieter click. It's been a long time since I took it apart and looked at the mechanics of it, but is the "hammer" somehow getting stuck on the bottom of the safety? How would it even do this?

12-27-2011, 06:58 PM	#1
oldmedik Member Join Date: Aug 2011 Location: south west ga. Posts: 48	mossberg 500as not acting right hi guys i picked up a mossberg 500as with24 inch ported barrel and removable chokes. the problem is every now and then, it doesnt want to let you chamber a new round after firing. no regular pattern, just when it decides. you have to really pump it, to get it to work, then it ejects empty, and fresh shell. any ideas would be appreciated. -->

12-27-2011, 07:28 PM	#2
Helix_FR TFF Moderator/Host Join Date: Apr 2009 Location: Imperial, MO Posts: 3,624	Re: mossberg 500as not acting right cartridge stop is not fully moving away from the rim of the next shell. If you action the gun upside down while looking through the loading port, you could probably see which one is not moving enough. __________________ Only cowards shoot with their eyes closed.... helixgunsmith.com Last edited by Helix_FR; 12-27-2011 at 07:29 PM..

12-28-2011, 07:28 AM	#3
oldmedik Member Join Date: Aug 2011 Location: south west ga. Posts: 48	Re: mossberg 500as not acting right thank you sir, i will look at this. is it possible for one of them to b upside down, i did a complete teardown and clean prior to shooting it. may have gotten dyslexic for amoment.

12-28-2011, 08:24 AM	#4
Helix_FR TFF Moderator/Host Join Date: Apr 2009 Location: Imperial, MO Posts: 3,624	Re: mossberg 500as not acting right Nope, they only go in one way. The one that is causing the issues is the thicker flat one that has no pivot pin. __________________ Only cowards shoot with their eyes closed.... helixgunsmith.com

12-31-2011, 02:07 PM	#5
Country101 Advanced Senior Member Join Date: Feb 2004 Location: Dardanelle, AR Contributor Posts: 2,028	Re: mossberg 500as not acting right I think Helix is dead on. I recently had a friend have the same issue. When unloading or shooting several, it would eject the fresh round out of the bottom after ejecting the spent hull. I thought this was the problem and advised him to order a new set of bars. They arent very expensive(maybe $12 if I remember right. My memory is bad though.) He called mossberg and told them the issue. They asked for his serial number and then his address. A week or two later he had a new set, free of charge. We have been out shooting since with no issues. Helix, I'm having a problem with my old revalation. Havent looked at it yet, so it may be simple, but after I shoot the first round When I pull the trigger on the next I hear a click and no boom. I have found that messing with the safety seems to release somethin and I hear another, quieter click. It's been a long time since I took it apart and looked at the mechanics of it, but is the "hammer" somehow getting stuck on the bottom of the safety? How would it even do this? __________________ Gainfully employed= shooting somebody elses bullets and getting paid for it Country101 Last edited by Country101; 12-31-2011 at 02:11 PM.. Reason: Wanted to ask a question.