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Got an 870 Hardwood Defense 18" (basically an Express). Anyone know what size O-ring will fit the endcap? I have a wave washer as well, but wanna try out the O-ring.
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No o-ring. The cap should ratchet down onto the barrel (if it has a detent) or the magazine plug if it is a newer model. -
It won't shake or vibrate loose, if that's what you're worried about.Comment
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One of my barrels doesn't have the detent and it will wiggle loose after a few rounds I just tighten it muscle memory now. I have thought about a O ring or something but never remember until i shoot it next.NRA Endowment Life Member
USMC 2001-2012
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