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Safety Block on Mossberg New Haven 600AT

Discussion in 'Firearm Maintenance, Safety And Troubleshooting' started by EZRIDER_2001, Mar 25, 2018.

  1. EZRIDER_2001

    EZRIDER_2001 Copper BB

    I have a 600AT New Haven that the safety broke on (big surprise). My research found that the safety switch and the block inside of the gun should be the same as for the 500. The problem that I am having is that when the block is installed, you can never release the hammer. The trigger is always blocked from movement. The switch and slider plate fit the cutout in the receiver just fine, and the switch slides back and forth into the detent positions just fine. I am stumped. I have tried installing with the hammer cocked and the hammer released.

    And yes, I tried installing the block in both directions - the proper direction is the only one that will allow you to slide the safety back and forth.

    My understanding is that the 600 AT is a low cost version of the 500 (I bought it in the late 1970s) and I find it hard to believe that Mossberg would have a "special" part for the 600.

    Here is what I bought - I have to think that it is something that I am doing wrong...



    Thanks in Advance!
  2. Woods Wanderer

    Woods Wanderer .410

    Have you tried to assemble it using the original safety block or did that also break?
  3. EZRIDER_2001

    EZRIDER_2001 Copper BB

    Wish that I could. It is lost to history. I think that I found the correct safety block (can't believe that it is different) on eBay. Should be here in a couple of days - fingers crossed.
  4. meanstreak

    meanstreak .30-06 Supporter

    Did you get your problem solved ? Enquiring minds want to know.

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