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easiest way would by to put it next to another 500a. if you can't do that, take a outside diameter measurement and post it.someone will be able to let you know for sure.
Thanks. Don't have another to compare. Not a big deal though, was just curious. I am going to be selling it (to catch up on some debts :evil: ) and was trying to get as much info a possible. I emailed Mossberg last week, but no reply yet. The entire gun weighs exactly 6.5lbs. 14" 590 w/bead sight, speedfeed.
If there's one thing we've learned about Mossberg it's that their line is full of exceptions.
The 'breacher' barrels on 500 and 590 models are heavy walled 590a1 barrels as well. I can't tell you how your barrel is marked, but my 590a1 and all others I've seen are plainly marked '590' on the side of the barrel. Here are the roll marks on my factory 590a1, model 51663...
Receiver...
Barrel...
The barrel roll marks are the exact same on my 590 with the breacher barrel...
Hmmm, my 14" 590 #50686 does not have 590 on the side. Below are some pics. Also does not say 'heavy walled bbl' on the box. Purchased new from local store in 2002.
Not sure at what point they changed the factory barrel roll marks, but I bought mine a year or two ago. I'm in the process of an SBS conversion on my 590. Ordered my new barrel and in speaking with Mossberg tech support and sales I was told that all factory 14" barrels are cut to order from stock 18.5" 590a1 barrels. You could always give Mossberg tech support a call for a definitive answer on the specs for your particular model...
Hey Old Mossy I tried to reply to your PM but apparently as a new member I'm not able to use the PM feature so there was no "reply" option so I thought I'd provide the info you requested here since this post deals with your question. The barrel on my 590 (50663) measures at the muzzle .857 north to south and .860 east to west.