




We offer free standard shipping to every province and territory in Canada.
We offer free standard shipping to every province and territory in Canada. No minimum purchase is required, and all orders include tracking for your convenience.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Deliveries to Canada’s outer and remote regions may experience seasonal delays caused by severe weather or limited carrier availability. We appreciate your patience and recommend allowing additional time for your order to arrive safely.
The Monstrum Red Dot Mount is engineered to pair seamlessly with Mossberg 500, 535, 590, 835 and Shockwave Series shotguns. By attaching directly to the factory mounting holes, this adapter enables a fast, clean sighting solution without the need for extra hardware or permanent modifications. The result is a sturdy platform that preserves the shotgun’s balance while providing a reliable aiming reference.
Built with rigid construction and tight tolerances, the mount stays aligned under recoil and supports rapid target acquisition. The direct fit minimizes bulk, helping you maintain the natural feel of your Mossberg alongside an enhanced aiming option.
The adapter is available in multiple footprint patterns to accommodate a variety of red dot sight footprints. Refer to the compatibility chart to confirm your red dot model fits the selected pattern. This flexibility helps you pair the mount with popular RDS models while keeping a low profile.
The package provides screw sets of varying lengths so you can match the depth of your red dot mounting holes. Use the screws that align with your device to ensure secure seating without over tightening.
Monstrum backs this mount with a lifetime guarantee, reflecting confidence in build quality and long term performance. Expect a stable, repeatable aiming platform ready for field use and steady practice sessions.
Q: Is this Monstrum mount compatible with Mossberg 500/535/590/835 and Shockwave shotguns?
A: Yes. The adapter is designed to fit Mossberg models and mounts into factory holes; check the compatibility chart for your red dot.
Q: What does the package include and do I need additional hardware?
A: The kit includes multiple screw sets of different lengths for red dot mounting holes. No extra hardware is required beyond the included screws.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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