Will this mount to the mossberg maverick 88 12g?

You can drill and tap it yourself. It will fit if you are willing and able to do this correctly. It is a bit of a pain, but it is a great way to save $250 over moving up to a 500 or 590 just for the holes. You can buy a drill press, still have money left over, and get an optic mounted on your shotty. The 88 is fantastic for the money, except for the lack for 4 holes atop the receiver. :(

I have a crimson trace on my Mossberg 590, will this be too much to fit on there?

I ordered this for use with my Shockwave with crimson trace. The crimson trace changes the profile of the receiver and the mount did not sit flush when installed. I opted for the GG&G side saddle designed for the shock wave. More expensive but better quality. When installed the top rail and side saddle was canted to the right and also it sat way too high above bore.

Is this good for 590 shockwave 20 gauge?

I have a 590 shockwave 12 gauge and fit and works great

Will this fit a mossberg 940?

It has predrilled holes that makes it compatible with almost all shotguns, so yes.

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Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns

Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns

Product ID: 161561204

Details

Brand
Monstrum
Closure Type
Open Top
Color
Tan
Manufacturer
Monstrum
Material
Aluminum

🎯Picatinny/Weaver rail compatible

🔫Fits Mossberg 500/590/Shockwave

⚙️No gunsmithing needed install

$126.09

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Description

🎯 Lock, Load, and Level Up Your Shotgun Game!

AMPLE SHELL CAPACITY - Choose between 12 gauge (holds 6 shells) or 20 gauge (holds 7 shells) to stay battle-ready.
ROBUST ALUMINUM BUILD - Durable, lightweight aluminum construction ensures long-lasting performance in the field.
TOOL FREE INSTALLATION - Mounts directly to factory holes with included screws—no gunsmithing or modifications required.
VERSATILE OPTICS MOUNTING - Integrated Picatinny rail lets you attach scopes, red dots, or optics for tactical edge.
PRECISION FIT FOR MOSSBERG SERIES - Seamlessly designed for 500, 590 & Shockwave models—no guesswork, just perfect compatibility.

The Monstrum Side Saddle Shell Holder is a precision-engineered aluminum accessory designed exclusively for Mossberg 500, 590, and Shockwave shotguns. Featuring a built-in Picatinny rail, it supports mounting of optics and red dots, while securely holding up to six 12 gauge or seven 20 gauge shells. Installation is straightforward with included screws, requiring no gunsmithing, making it the ultimate upgrade for serious shooters seeking tactical readiness and convenience.

Specifications

ASIN	B07WHN74TW
Best Sellers Rank	#49,334 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #39 in Hunting & Shooting Gun Holders
Brand Name	Monstrum
Closure Type	Open Top
Color	Tan
Customer Reviews	4.6 4.6 out of 5 stars (3,748)
Manufacturer	Monstrum
Manufacturer Part Number	Z83
Material Type	Aluminum
Number of Compartments	1
UPC	850004377246

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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$126.09

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ecuador.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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