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Are Mossberg 500 Cartridge Stops Interchangeable ?

Discussion in 'Shotguns' started by southwest1, Feb 16, 2013.

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  1. southwest1

    southwest1 Member

    Apr 5, 2009
    Hey Everyone,

    I have asked this question on a couple of sites, no one seems to know for sure..maybe someone here can help..

    I have owned a 12 ga Mossberg 500 for years. Don't shoot it much, but when I do, it might be 50 - 100 clays a weekend at the range, a handful of times per year.

    Just recently I had a cycling issue. Being handy, I did my homework and called Mossberg. They were good enough to send me replacement Cartridge Stop(s). When the package arrived, two stops were in the envelope, one for a 12 ga and one for a 20ga, they looked exactly the same, just stamped 12 and 20.

    Now here is what is wild.. I take out my original Cartridge Stop and noticed it was a 20 Ga :eek: It came that way from the factory ! Are Mossberg 500 Cartridge Stops 12 vs 20 gauge the same ?

    I have now replaced the old 20 ga one with the 12 gauge one and cycled through four 12 ga Snap Caps several times. The mechanism seems to work fine. Hopefully that will translate to the range, the last time I did that, the live shells failed to cycle as well as the dummies.

    Any thoughts ?

  2. SHR970

    SHR970 Member

    Mar 25, 2011
    Yes. They are dimensionally identical. The only difference is the 12 and 20 stamp.
  3. RugerNo

    RugerNo Member

    Oct 16, 2003
    The first 20 ga 500's only had one cartridge stop. Stamping 20 on the proper one kept someone from receiving the wrong one and made it easier for the parts pullers to ship the proper pair for the 12 ga and 16's as well.
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