Mossberg 590RM
<p>The Mossberg 590RM is the revolver-magazine variant of the <a href="/mossberg-590/">Mossberg 590</a> platform — replacing the traditional tubular magazine with a detachable, revolving cylinder that holds 3 or 6 rounds depending on model. The 590RM solves the 590’s one historical limitation (slow reloads) by allowing instant magazine swaps, and the Chisel Sight System variant adds a factory Magpul front sight for faster target acquisition.</p>
<details><summary style="cursor: pointer; color: #1a5fa8; font-weight: 600; margin: 0.5rem 0 1rem;">Read our full 590RM Buying Guide ↓</summary>
<h2>How the Revolver Magazine Works</h2>
<p>The 590RM’s detachable magazine is a rotating cylinder that drops out of the receiver and replaces with a loaded spare in seconds — fundamentally different from a traditional tubular magazine that requires loading one shell at a time. This gives the 590RM the tactical advantage of instant reloads without switching to a box-magazine-fed shotgun like an AR-12 platform. The cylinder indexes with the pump action, rotating to present the next round on each stroke.</p>
<h2>590RM vs. 590RM Chisel</h2>
<p>The standard 590RM comes with Mossberg’s traditional bead sight. The 590RM Chisel adds the Chisel Sight System — a Magpul-designed front sight with a more visible blade profile that’s easier to pick up on target under stress than a standard bead. The Chisel models also tend to include different furniture options (Magpul SGA stock and MOE M-LOK forend).</p>
<h2>Magazine Capacity and Spares</h2>
<p>The 590RM ships with a revolving magazine cylinder. Spare cylinders can be pre-loaded and carried on the belt for instant reloads, similar to carrying spare box magazines for a semi-auto shotgun. This is the 590RM’s key advantage for competition and tactical use — reload speed comparable to a box-magazine shotgun while keeping the proven pump-action reliability.</p>
<h2>590RM vs. Standard 590</h2>
<p>The standard <a href="/mossberg-590/">590</a> uses a tubular magazine (6+1 or 8+1) that requires loading one shell at a time through the loading port. The 590RM trades the higher tube capacity for instant magazine swaps. For home defense where you’re unlikely to need a reload, the standard 590 is simpler. For competition, tactical training, or any scenario where reload speed matters, the 590RM has a clear advantage.</p>
<p><strong>Frequently Asked Questions</strong></p>
<p><strong>How does the 590RM reload?</strong><br>Press the magazine release, drop the empty cylinder, insert a pre-loaded spare cylinder. Total reload time is seconds, not the 15+ seconds of loading a tube magazine.</p>
<p><strong>What’s the Chisel Sight System?</strong><br>A Magpul-designed front sight blade that replaces the standard bead for faster target acquisition.</p>
<p><strong>Can I use standard 590 barrels and stocks on the 590RM?</strong><br>Stocks and furniture are generally compatible; barrels are not interchangeable due to the different magazine system.</p>
<p><strong>Is the 590RM reliable?</strong><br>It uses the same pump-action mechanism as the standard 590 (Mil-Spec 3443 tested), with the added magazine system. Reports from the field indicate reliability is on par with the standard 590.</p>
<p><strong>See Also:</strong> <a href="/mossberg-590/">Mossberg 590</a> • <a href="/mossberg-590-retrograde/">590 Retrograde</a> • <a href="/mossberg/">Mossberg</a> • <a href="/pump-shotguns/">Pump Shotguns</a> • <a href="/12-gauge-shotguns/">12 Gauge Shotguns</a></p>
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