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Mossberg 590A1 14" SBS

Boob McNutt

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I got a lead on some LE trades at a price I was ecstatic to live with.
Went today to fondle before I file paperwork in a few days (left deposit).
My dealer had the absolute GALL to ask me if I was sure I didn't want a Super Shorty.
He's made a lot of them over the years.
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So I'm buying a 590A1, LE trade out of Las Vegas, NM.
I looked it over quite a bit. The speed feed doesn't appear to have ever been used, the notch is in excellent condition on both sides. The sling mount is a GG&G, and the tube happily holds 5 round of 2 3/4" 00.
The sling is a turd, but it would get the job done, and is included.

The 14" 590A1 is still in production as pictured, MSRP $883.

Leave it to a 7" Super Shorty AOW with a Serbu pump to make my 14" SBS look like a dang full size.
 
Where’d you pick this up from? I’ve been pondering the SBS route. Thought I’d form 1 it via a Shockwave or more likely a Tac-14.
 
Red Dirt Armory in Mustang. He had 5, I think at least 3 are sold, probably 4.
Home based FFL that is mainly the kind of appointment only that requires a "hey are you home" text 😁
 
Ok so I don't know what the hell I'm doing wrong, but I can only get the tube to hold four 2.5" shells.
This is advertised for LE use, and it's supposed to hold 5+1.
I tore it apart, the follower, spring, and spring retainer all look OEM.
What am I doing wrong?
I understand it's a 14" barrel and roughly a 14" tube, but 2.5x5 is 12.5" of shells, correct?
Since I'm kind of in a weird boat with this question, I'll say it should share the dimensions of a Shockwave tube, and those are advertised as 5+1 too...


590A1 14":
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Shockwave:
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Just found a link for manuals at Mossberg so I'm gonna go read that
Edit:
The manual for the 590 Shockwave says 5+1 2-3/4" shells.
It's actually advertised as a "six shot".
Screenshot_20240504-223439.png
The 590 model says roughly the same thing, 5+1=6, unless running 3" shells then it's 4+1.
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Are you getting 4, and the 5th goes mostly in but not fully, or not even close?

Not all shells are equal. My 590 was 8+1 and had to run a certain brand shells to get that capacity, being shell length is the shell that's been shot...not the crimped unfired shell, so they vary.
 
Are you getting 4, and the 5th goes mostly in but not fully, or not even close?

Not all shells are equal. My 590 was 8+1 and had to run a certain brand shells to get that capacity, being shell length is the shell that's been shot...not the crimped unfired shell, so they vary.
Yep, 5th only goes in about 3/4 of the way, not far enough to snag. I will grab my shoebox full of random shells and see if I can get 5 out of anything else
 
The S&B 00 Buck is labeled in the box 2-3/4 and the shells OAL measure 2.5" unfired. It's my first serious foray outside of the maverick world
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For the Estate 2-3/4" buck, it'll take 4 and 99% of the fifth.
Winchester 7.5 shot 2-3/4" shells, takes 5 with no issues whatsoever.
 
Remington Pheasant Load 2-3/4" 1-1/4" 4 Shot:
5 shells effortlessly
 
Just get to find a combo of shot you like, that has the unfired length the gun likes. I want to say Winchester 00 Buck that came in 10 count boxes at Walmart was what worked for me.

I can measure OAL of some stuff tomorrow if you want. What size shot are you wanting?
 
Well, I was hoping for some 00 for a nice bedside shotgun with some range use. Wouldn't really plan on taking a class or a competition with it, and I'm not leaving a stamp in the car, like ever.
I know the world of best home defense load has been beat to death, so I'll just simplify with something that'll kill dead, and fit 5 in the tube haha.
 
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