Bayonet Loose M590A1

Model12Win

Moderator
Hello all. I have a new Mossberg M590A1 shotgun and decided to get a bayonet for it. I got a surplus Vietnam era M7 bayonet off ebay and it came today. I attached it, but it seems very loose. It rotates on the lug badly and rattles a whole lot. The bayonet does not come off no matter how hard I shake it so it's on there, but is not snug to say the least. Here is a video I took:

https://www.dropbox.com/s/gqldwva6wq4who8/J#.mp4?dl=0

I am wondering if this is normal for this bayonet to be loose on a M590A1 shotgun? Should it lock up tight? Are some M7 bayonets looser than others, should I worry?

If anyone could help, that would be great. I spent over $40 for the bayonet and scabbard and plenty on the shotgun so if anything is wrong, I want to know. Thank you so much.
 
typical

That sounds about like any other firearm I've handled with a bayonet, from Civil War Enfield/Springfield, to current M4. They rattle, wobble, and flop around. If it don't come off, your're good.
 
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