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 Post subject: A400 problem
PostPosted: Sat Feb 06, 2021 4:36 pm 
Limited Edition

Joined: Tue Nov 28, 2006 8:49 pm
Posts: 444
Location: USA
I've disassembled and clEaned my 20ga a400 dozens of times with never a problem. Today the action bar assembly comes to a dead stop half way into the receiver. Everything looks normal with the inside of the receiver and with the bolt. I've fiddled with the bolt release, removed the trigger group. Nothing helps. What's up?




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 Post subject: Re: A400 problem
PostPosted: Sat Feb 06, 2021 5:19 pm 
Crown Grade

Joined: Sun Jan 17, 2016 3:34 pm
Posts: 6147
Get the bolt arms properly lined up with the spring tube in the stock. I hold the gun vertically to accomplish this.


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 Post subject: Re: A400 problem
PostPosted: Sat Feb 06, 2021 5:21 pm 
Limited Edition

Joined: Thu Sep 29, 2011 8:27 pm
Posts: 372
Location: Kentucky
Recoil spring is probably hitting the magazine tube.


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 Post subject: Re: A400 problem
PostPosted: Sat Feb 06, 2021 7:31 pm 
Tournament Grade

Joined: Fri Jan 20, 2012 4:16 pm
Posts: 248
Denver1911 wrote:
Recoil spring is probably hitting the magazine tube.


Yes, this happened to me once. It was just after I replaced the recoil spring. The spring was not properly centered in the plastic sleeve. The fix was as simple as pressing the spring evenly around the plastic sleeve so that the spring passed cleanly over the end of the magazine tube.


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 Post subject: Re: A400 problem
PostPosted: Sun Feb 07, 2021 8:39 am 
Limited Edition

Joined: Tue Nov 28, 2006 8:49 pm
Posts: 444
Location: USA
Got it fixed! Thanks, guys...you nailed it. The only thing I did differently today was to run a patch wrapped around a bore brush through the spring. Apparently, I disturbed it's normal position somehow, although that wasn't visually apparent. I put the spring assembly onto the magazine tube backwards just to see what would happen, and that seemed to fix the problem. Went right into position after that. Now I know!




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