Mossberg's 590 RM Chisel: 20 Rounds of 12 Gauge in a Truck-Size Shotgun

Colion Noir takes a look at Mossberg's 590 RM Chisel, a magazine-fed pump shotgun built on the Shockwave-style platform, and spends most of the video explaining why a short-barreled 12 gauge that runs detachable mags changes the math on what a small shotgun can do.

Key points

• Capacity: The 590 RM Chisel ditches the tube for a magazine, with 10-round mags standard and a 20-round option available, far beyond the 5-6 rounds a typical chopped tube gun holds.
• Size vs. firepower: Noir compares it to dropping a Hellcat engine into a Mini Cooper, calling it rifle-level ergonomics and near-rifle capacity packed into a shotgun small enough to tuck behind a truck seat.
• Controls: It uses a rotary safety selector positioned like an AR's, which he says is ambidextrous and easier to find than a push-button safety.
• Build: Features include an eight-position collapsible and folding stock, M-LOK slots on the pump, and a Picatinny rail up top where he mounted an optic.
• Price and paperwork: MSRP is listed at $1,435, and since it's a short-barreled shotgun it falls under NFA rules, meaning a tax stamp and paperwork depending on your state.

Quick take

Noir frames this less as a range toy and more as a serious truck or ranch gun, arguing the combination of maneuverability, 12 gauge power, and real capacity makes it one of the stronger candidates for that role, even if it's not the single best tool for every job it can do.

Watch the full video: Colion Noir