Differences between the 590 and 590M receivers?

[nvflash]

Good day everyone, first time poster and new member.

So I joined the Mossberg owners club with a 590M and I want to trick it out a bit. I'd like to add a pistol grip with a good stock on it, maybe an adjustable stock. A front end kit with a nice light. A laser saddle and upgrade the ghost ring sights with a little better kit.

This is what I'm thinking so far:

Streamlight 69600 TL-Racker 1000 Lumen Forend( Not real sure which LT-Racker fits the 590M? )​

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ATI Outdoors T3 Shotgun Stock( I don't think this one is adjustable, but I'm not fully sold on one. Would like people's insights on what pistol grip with full stock they use and like? )​

UTG 590M Mag-Fed Optic Mount 12 Gauge Mossberg 590:​

UTG 590M Mag-Fed Optic Mount 12 Gauge Mossberg 590-471738555

vtsupply-com.3dcartstores.com

LS-250G LASERSADDLE™ GREEN LASER SIGHT FOR MOSSBERG 12 & 20 GAUGE SHOTGUNS​

​

This is where things get sticky, the LS-250 states that "

• DOES NOT FIT THE 590M RECEIVERS."

So just looking at the 590M it looks like it is missing the two forward mounting screw holes that the 590 receiver has.

What I am wondering is can these two holes be drilled in the 590M receiver without interference with the action of the shotgun?

Everyone's thoughts, suggestions, and comments are welcome, thanks.

 

[old mossy]

Welcome to the forum.
Yes you can drill and tap the receiver, just be careful it's aluminum. Also the length of the screws you use.

 

[Jmm14534]

Welcome to the forum from the socialist republic of New York. I don’t know much about the Mossberg 590M model but good luck with the build. It’s fun to personalize your weapons. Please post pics of the finished product.

 

[nvflash]

After taking a closer look at the 590M it does seem to have two forward screw mount holes on the receiver, but the holes and spacing may not be the same as the 590?





It's hard to judge without some clear pictures with a tape measure laid down on both the 590 and the 590M. I'd take the ghost ring sight off but I don't know what type of security screws these are? Anyone know?

 

[old mossy]

You can use a larger flat screwdriver on the safety screw with a lot of down pressure as you turn it.

 

[nvflash]

Welcome to the forum from the socialist republic of New York. I don’t know much about the Mossberg 590M model but good luck with the build. It’s fun to personalize your weapons. Please post pics of the finished product.

Here is one setup like this only it's the 590M shockwave...




Of course the Shockwave has a 15" barrel, so adding the shoulder stock without a tax stamp for a short barreled shotgun is not advisable.

 

[Jmm14534]

On those funky looking cap screws on the GRS try a torx bit. Probably some Euro fastener. I’m sure the holes in the receiver are “Mossberg standard” so you’ll not have to drill and tap the receiver. Also what Old Mossy said, be mindful of the length of the fasteners so that they don’t interfere with the bolt. Blue loctite only.

 

[Rodburner]

I don’t know anything about all that other stuff, but the laser beam from the saddle shines straight down the barrel at the 2 o’clock position and offset from the barrel about a quarter inch. Make sure whatever you hang out there isn’t going to obstruct the beam. Forend’s with integral heat shields and even puffy gloves will block the beam as well..

 

[nvflash]

I contacted StreamLight about the TL-Racker and they said they did not make one for the 590M, but I know that some people have used the on at least the 590M Shockwave so I suspect it can be made to work if I oder the right one, I'm just not sure which that is.

I'lll likely just take my best educated guess when I get ready to oder the front end because it's not like I can't sell it to someone with a regular 590 if I can't get it to work.

I ordered my 590M with the heat shield and upgraded sights, so I may end up removing the heat shield to get the TL-Racker and LS-250G to fit proper. No great loss, Hickok45 on Youtube did a lot of shooting with a regular 590 he bought used and removed the heat shield and it never got that hot even after he put 75 or so rounds though it. I mean it looks cool, but it really isn't needed.

 

[Jmm14534]

I was at my LGS today and he had one of these on the wall. I looked at the fasteners that hold the GRS in place. They have a hex pattern on them as well so you may be able to remove them with a regular hex key. Maybe the key will come in the box if you’re lucky.
Also it looks like you won’t be able to mount both the UTG product and the Crimson Trace product at the same time. If you have the laser you probably don’t need a red dot anyway unless it’s cool factor only. The GRS maybe ok as is.

 

[nvflash]

I was at my LGS today and he had one of these on the wall. I looked at the fasteners that hold the GRS in place. They have a hex pattern on them as well so you may be able to remove them with a regular hex key. Maybe the key will come in the box if you’re lucky.
Also it looks like you won’t be able to mount both the UTG product and the Crimson Trace product at the same time. If you have the laser you probably don’t need a red dot anyway unless it’s cool factor only. The GRS maybe ok as is.

Thanks for the input, I'll take it under advisement.

 

[nvflash]

I was at my LGS today and he had one of these on the wall. I looked at the fasteners that hold the GRS in place. They have a hex pattern on them as well so you may be able to remove them with a regular hex key. Maybe the key will come in the box if you’re lucky.
Also it looks like you won’t be able to mount both the UTG product and the Crimson Trace product at the same time. If you have the laser you probably don’t need a red dot anyway unless it’s cool factor only. The GRS maybe ok as is.

I see what you are saying about the UTG, it affixes around the sides. I should be able to just get a standard top rail and mount optics to it if that's what I decide I want, thanks.

 

[Ernst]

Questions for you 590M owners.

I've read that a plain jane 590M with a loaded magazine (10, 15 or 20 rounds) weighs in between 10 and 11 lbs. Is that what your seeing?

Secondly, with a loaded magazine installed where is the weapon's balance point?

Appreciate any info you guys could share. Seems like a heavy weapon to carry around all day.

Regards

 

[nvflash]

Questions for you 590M owners.

I've read that a plain jane 590M with a loaded magazine (10, 15 or 20 rounds) weighs in between 10 and 11 lbs. Is that what your seeing?

Secondly, with a loaded magazine installed where is the weapon's balance point?

Appreciate any info you guys could share. Seems like a heavy weapon to carry around all day.

Regards

I don't really have any kind of good scale to measure the weight of it right now, but yes the gun is a little on the heavy side.

It's really a niche gun that doesn't offer a whole lot outside of a few specific use cases over the 590/590A1, but it's still a pump action shotgun, so it's pretty versatile.

As far as a specific legal use case, it's a really good crowd control weapon to protect life and property when the police maybe unwilling to do so.

That's really the only thing it better at than the 590/590A1, because it's quicker to reload with the detachable magazine.

The drawback is you need to be smooth with the pump action as racking it back too fast can dislodge the next round in the clip and hang the action requiring you to clear the jam.

The weight of the gun isn't really an issue for a strong person with long arms, you just equip it with a strap.

Now fun factor, it's just a blast to target shoot with a 20 round mag.

 

[Bobster]

That's really the only thing it better at than the 590/590A1, because it's quicker to reload with the detachable magazine.

I think Jerry and Lena would disagree... VIDEO
Jerry has a video of a special rig for competition--less than 1.5sec for 4rds... VIDEO

 

[nvflash]

I think Jerry and Lena would disagree... VIDEO
Jerry has a video of a special rig for competition--less than 1.5sec for 4rds... VIDEO

Well when you start talking custom machine work vs off the self parts, sure you can do some cool stuff, but I was really talking a 590M vs the 590/590A1.

Tho you just don't get something for nothing, as I said you need to be smooth on the rack back operation, and that's not largely an issue with the tube feed 590's.

Also there are some reports of shells that deform after 60 or 90 days when left in the 590M magazine, so that's another drawback of the 590M that we don't really see with the tube feed 590's.

 

[nvflash]

Questions for you 590M owners.

I've read that a plain jane 590M with a loaded magazine (10, 15 or 20 rounds) weighs in between 10 and 11 lbs. Is that what your seeing?

Secondly, with a loaded magazine installed where is the weapon's balance point?

Appreciate any info you guys could share. Seems like a heavy weapon to carry around all day.

Regards

Also you can add 7 rounds to the 590M tube as a backup, so that adds to the weight of the gun as well.

The magazine is not drop and go, it won't fall from it own weight, you need to trip the release and pivot the magazine to detach it. So it really takes two hands.

I'll have to look at if that can be "worked on", it would kind of be nice in some situations to have it fall on its own when you trip the release. It weighs enough even empty that's for sure.

Tho these magazines cost a mint, it's not like you are dropping some cheap $15 AR mag in the dirt, we're talking $75-$100 per mag depending on the capacity.

 

[Ernst]

Thanks guys for the comments. Just as where I'm coming from, I have "conventional" 500s, 590s and Shockwaves so I'm very familiar with their operation and since I typically use one daily I certainly understand the rigors of carrying one all day. I'm just trying to get smarter on the 590M.

I'm just not sure of the 590M's utility. Not for legal hunting. Weighs a ton before even the first accessory is added. I seriously doubt anyone wants to carry a 11 to 15 pound shotgun all day long. Plus carring several extra magazines. A regular heavy barreled 590A1 is bad enough.

But I'm wondering about the weapon's balance and point ability? Not sure about shooting clays?

For those of you who have one what do you see as their primarily utility?

Regards

 

[nvflash]

Thanks guys for the comments. Just as where I'm coming from, I have "conventional" 500s, 590s and Shockwaves so I'm very familiar with their operation and since I typically use one daily I certainly understand the rigors of carrying one all day. I'm just trying to get smarter on the 590M.

I'm just not sure of the 590M's utility. Not for legal hunting. Weighs a ton before even the first accessory is added. I seriously doubt anyone wants to carry a 11 to 15 pound shotgun all day long. Plus carring several extra magazines. A regular heavy barreled 590A1 is bad enough.

But I'm wondering about the weapon's balance and point ability? Not sure about shooting clays?

For those of you who have one what do you see as their primarily utility?

Regards

It's really made as a crowd control shotgun, but it's sort of a just of all trades and master of none.

It does have a 5 round clip for hunting in states that require it, so the weight would be less. There is no real need to carry extra magazines when hunting.

I've never shot clays so I can't comment on that other than to say an 18.5 in. barrel would likely limit you here, or at least I presume.

I don't see the weight as an issue for me, but then I spend all night loading boxes that weigh anywhere from a few pounds to 175 pounds.

 

[nvflash]

Thanks guys for the comments. Just as where I'm coming from, I have "conventional" 500s, 590s and Shockwaves so I'm very familiar with their operation and since I typically use one daily I certainly understand the rigors of carrying one all day. I'm just trying to get smarter on the 590M.

I'm just not sure of the 590M's utility. Not for legal hunting. Weighs a ton before even the first accessory is added. I seriously doubt anyone wants to carry a 11 to 15 pound shotgun all day long. Plus carring several extra magazines. A regular heavy barreled 590A1 is bad enough.

But I'm wondering about the weapon's balance and point ability? Not sure about shooting clays?

For those of you who have one what do you see as their primarily utility?

Regards

I was curious about the weight factor. On my Sunbeam scale, the 590M without a magazine weighed in at 7 lbs. With fully loaded magazines, the weight of the gun ran as follows: 5-round (8.5 lbs), 10-round (9 lbs. 6 oz.), 15-round (10 lbs. 3 oz.) and 20-round (10 lbs. 14 oz.).

Mossberg’s 590M Mag-Fed

With a capacity of 5, 10, 15, or 20 rounds, Mossberg’s new 12-gauge 590M Mag-Fed is yet another intriguing addition to their stable.

gunsmagazine.com