Mossberg 590A1 14" SBS

[Boob McNutt]

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.

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.

590A1 Class III Pump-Action – 6-Shot

This NFA/Class 3 Short Barreled Shotgun has standard590A1 MIL-SPEC 3443E construction, and also features a strapped forend, GhostRing sights, and +4 Shell Holder stock. Requires a Tax Stamp for transfers.

www.mossberg.com

Leave it to a 7" Super Shorty AOW with a Serbu pump to make my 14" SBS look like a dang full size.

 

[Glockpride]

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.

 

[Boob McNutt]

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

 

[Boob McNutt]

Well, I was approved. Took 10 days, 14 hours from "submit" to "approved".
And that included mailing in physical print sheets on an otherwise e-file.
Will get some pics tomorrow.

 

[Boob McNutt]

I don't have many photogenic spaces in my house.

 

[Boob McNutt]

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 Class III Pump-Action – 6-Shot

This NFA/Class 3 Short Barreled Shotgun has standard590A1 MIL-SPEC 3443E construction, and also features a strapped forend, GhostRing sights, and +4 Shell Holder stock. Requires a Tax Stamp for transfers.

www.mossberg.com

590A1 14":

Shockwave:

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".

The 590 model says roughly the same thing, 5+1=6, unless running 3" shells then it's 4+1.

 

[adamsredlines]

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.

 

[Boob McNutt]

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

 

[Boob McNutt]

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

 

[Boob McNutt]

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.

 

[Boob McNutt]

Remington Pheasant Load 2-3/4" 1-1/4" 4 Shot:
5 shells effortlessly

 

[adamsredlines]

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?

 

[Boob McNutt]

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.

 

[Roy]

I don't have many photogenic spaces in my house

You need a motel room cuck chair but for gun pics

 

[Boob McNutt]

So I figured out the ammo issue, Austin at COPS went above and beyond on that. I need to get some more, this thing shoots like a dream.
This Fiocchi funs 5+1 as the factory claimed.
I do have a slip-on limbsaver, but honestly it's not needed and I'll probably take it back off.

 

[Boob McNutt]

I couldn't get the thought of a Serbu out of my head, but Serbu/Safety Harbor has discontinued the folding pump action parts.
So I did what I could do, built a clone to see if I loved it.

It's nice to be able to swap from grip to stock, the wonders of a stamp.

The pump grip is much fatter than a Serbu, but it works the same, spring loaded, pull it down to unlock it from horizontal to vertical and back.

The forend is MLOK made by Ergo for the shockwave, cus that's what was available easiest, and quite a bit cheaper than the Ergo picatinny forend, with Magpul rail covers on the side.

And to top it off, the elastic Gunmate side saddle I've had on every shotgun my adult life, because it's ten times faster than the speedfeed, and holds one more. I just haven't bought a new stock yet.

The folding grip is a UTG aluminum QD foldable foregrip, and is extremely sturdy. I have no doubt that it will hold up to the strenuous use of pumping and recoil.

With the help of a picatinny adapter, here's the finished result, my 14" serbu clone, and back to the way I like it.

I did end up swapping the GG&G for a different GG&G with dual sling mounts, to run a TLR-1 HL, and a gray Magpul sling.