Grimlock Mossberg 500/590/835/930/Shockwave Picatinny Rail Mount

Exclusively from Monstrum - the Grimlock Series optic mounts offer a sleeker and more distinctive design than our previous generation mounts, contoured to the curvature of your receiver. All with the same functionality and reliability as our standard optic mounts.

The Mossberg picatinny rail mount is a dedicated mount built specifically for Mossberg shotgun platforms. Compatible with the following models:

Mossberg 500

Mossberg 535

Mossberg 590

Mossberg 590 Shockwave

Mossberg 590a1

Mossberg 835

Mossberg 930

Not compatible with:

Pre-1997 Mossberg shotguns | Requires 6x48TPI screws not included

Mossbergs without pre-drilled and tapped receivers | Requires drilling and tapping receiver

Mossberg Maverick 88 | Requires drilling and tapping receiver

Mossbergs with Crimson Trace LS250 installed | Requires M4-.70 x 12 screws not included

Mossberg 930 | Requires modifications

Mossberg 500 Flex | Requires modifications

Can be used to mount rings, red dots, or optics using the Picatinny 1913 or the Weaver mounting standard. Installs directly into the factory mounting holes on the Mossberg receiver using the included set screws. No additional hardware required. Rail is 5.25 inches or 12 picatinny rail slots in length