Hi all.
The 590RM is a shotgun offering from Mossberg. "R" is for rotary (safety) and "M" is for magazine (detachable). It offers an AR-style safety selector which allows for excellent ergos with the AR-style grip. Normally to run a pistol grip on a 590, the safety becomes cumbersome due to it's placement on top of the shotgun. This design solves that ergonomic issue and adds detachable mags.
Please let us know below if you want to see us stock the mags for these! Include the capacity you want. These would potentially be coming in September.
Magazines are available in 5rd, 10rd, 15rd and 20rd capacities. These will come in at full capacity, not pinned. This is because they fit a manual action firearm only.
Proposed pricing as of July 13 2026:
20RD - $209.95
15RD - $185.95
10RD - $164.95
5RD - $139.95
FREE SHIPPING TO MOST CANADIAN ADDRESSES FOR ORDERS OVER $250
The 590RM is a shotgun offering from Mossberg. "R" is for rotary (safety) and "M" is for magazine (detachable). It offers an AR-style safety selector which allows for excellent ergos with the AR-style grip. Normally to run a pistol grip on a 590, the safety becomes cumbersome due to it's placement on top of the shotgun. This design solves that ergonomic issue and adds detachable mags.
Please let us know below if you want to see us stock the mags for these! Include the capacity you want. These would potentially be coming in September.
Magazines are available in 5rd, 10rd, 15rd and 20rd capacities. These will come in at full capacity, not pinned. This is because they fit a manual action firearm only.
Proposed pricing as of July 13 2026:
20RD - $209.95
15RD - $185.95
10RD - $164.95
5RD - $139.95
FREE SHIPPING TO MOST CANADIAN ADDRESSES FOR ORDERS OVER $250
