Monstrum Grimlock Shotgun Rail Mount with Universal Mounting System – RMR/RMSc Footprint
Overview Meet the Monstrum Grimlock Shotgun Rail Mount, engineered to streamline your setup from receiver to reliable aiming. This mount...
Vendor:
Monstrum
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Description
xOverview
Meet the Monstrum Grimlock Shotgun Rail Mount, engineered to streamline your setup from receiver to reliable aiming. This mount uses a universal mounting system designed to secure to most popular drilled and tapped shotgun receivers, with a dedicated red dot base for direct mounting of your optic onto the preferred shotgun receiver, keeping alignment tight and the profile clean.
Footprint options and compatibility
Two footprint standards keep your sight options flexible: choose the RMR footprint or the RMSc footprint to match your red dot. Not compatible with other red dot models; please view the compatibility chart to verify your red dot works with this mount before you purchase.
Versatile drilling and screws
The Grimlock is designed with slots that accommodate multiple drill hole patterns, plus a complete set of commonly used drill hole screws. It installs directly into the factory mounting holes on the receiver using the included set screws, with a recommended torque of 15 in/lbs for a secure, but not over-tightened, fit.
Compatibility highlights
- Mossberg 500/590/835/930/Shockwave
- Remington 870 Express Tactical
- Winchester SXP Defender
- Remington 1300 / M1 / M2 / M3 / Super Black Eagle
- Stoeger M3000 / M3500
- Weaver 93 drill hole pattern
What’s included and installation tips
Includes both #8-40 and #6-48 gunsmithing screw sets in multiple lengths for compatibility across different makes and models, along with the universal mounting hardware. Follow the torque guidance to avoid over- or under-tightening during install.
Warranty and quality
All Monstrum products come with a lifetime guarantee, reflecting the brand's commitment to reliable hardware that performs under field conditions.
FAQ
Q: Which shotgun models are compatible with the Grimlock Rail Mount?
A: Compatible with many drilled and tapped receivers; see the chart for Mossberg 500/590/835/930/Shockwave, Remington 870, Winchester SXP, Stoeger M3000/M3500, and more.
Q: What is included in the package for Grimlock?
A: Includes both #8-40 and #6-48 gunsmithing screw sets and universal mounting hardware for straightforward installation.
Shipping & Return
xReturns Policy
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.
Shipping
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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