Availability: In Stock
The ProMag RM20 is a 20-round 5.56x45mm NATO magazine purpose-built for AR-15 rifles. If you run a modern sporting rifle for hunting, sport shooting, or training, this magazine delivers reliable ammunition storage without breaking your budget. The 20-round capacity strikes a balance for shooters who want adequate firepower without the bulk and weight of extended 30-round mags—a practical choice for hunting applications, tactical courses, or range sessions where magazine swaps keep you engaged with your shooting.
ProMag engineered the RM20 around durability and dependable feeding. The magazine body is molded from a proprietary DuPont Zytel-based polymer, chosen for toughness and resistance to wear over countless load-unload cycles. The standout feature is the patented anti-tilt roller follower, which orients rounds consistently as they stack and feed, reducing the binding and tilt that can cause feeding hiccups—especially important when you're running suppressed, pushing heavy loads, or running your rifle hard. The spring itself is formed from heat-treated chrome silicon wire, designed to maintain pressure and cycle reliability across temperature swings and extended storage.
Built in the USA, the RM20 represents a no-nonsense approach to magazine design: solid materials, proven engineering, and honest performance at a competitive cost. Whether you're outfitting a new build, stocking spares, or just need dependable mags that won't let you down at the line, this is a working magazine for working shooters.
| Caliber | 5.56x45mm NATO |
| Capacity | 20 rounds |
| Platform | AR-15 |
| Material (Body) | DuPont Zytel-based polymer |
| Spring Material | Heat-treated chrome silicon wire |
| Follower Type | Patented anti-tilt roller follower |
| Color | Black |
| Country of Origin | USA |
Yes. The ProMag RM20 is designed for standard AR-15 rifles chambered in 5.56x45mm NATO. It will fit any AR-15 with a standard magazine well.
The patented anti-tilt roller follower keeps rounds aligned as they feed, reducing binding and tilting that can cause feeding issues. This is especially valuable when running your rifle hard or in suppressed configurations.
Yes. ProMag manufactures the RM20 in the USA.
A 20-round mag is lighter and more compact than a 30-rounder, making it ideal for hunting where you prioritize maneuverability, or for sport shooting where reloads keep the course interesting. It's a solid middle ground for shooters who don't need maximum capacity.
SKU: 115692707 • Width: 2.6in • Height: 0.8in • Depth: 5.5in • Weight: 0.25oz
Availability: In Stock
The ProMag RM20 is a 20-round 5.56x45mm NATO magazine purpose-built for AR-15 rifles. If you run a modern sporting rifle for hunting, sport shooting, or training, this magazine delivers reliable ammunition storage without breaking your budget. The 20-round capacity strikes a balance for shooters who want adequate firepower without the bulk and weight of extended 30-round mags—a practical choice for hunting applications, tactical courses, or range sessions where magazine swaps keep you engaged with your shooting.
ProMag engineered the RM20 around durability and dependable feeding. The magazine body is molded from a proprietary DuPont Zytel-based polymer, chosen for toughness and resistance to wear over countless load-unload cycles. The standout feature is the patented anti-tilt roller follower, which orients rounds consistently as they stack and feed, reducing the binding and tilt that can cause feeding hiccups—especially important when you're running suppressed, pushing heavy loads, or running your rifle hard. The spring itself is formed from heat-treated chrome silicon wire, designed to maintain pressure and cycle reliability across temperature swings and extended storage.
Built in the USA, the RM20 represents a no-nonsense approach to magazine design: solid materials, proven engineering, and honest performance at a competitive cost. Whether you're outfitting a new build, stocking spares, or just need dependable mags that won't let you down at the line, this is a working magazine for working shooters.
| Caliber | 5.56x45mm NATO |
| Capacity | 20 rounds |
| Platform | AR-15 |
| Material (Body) | DuPont Zytel-based polymer |
| Spring Material | Heat-treated chrome silicon wire |
| Follower Type | Patented anti-tilt roller follower |
| Color | Black |
| Country of Origin | USA |
Yes. The ProMag RM20 is designed for standard AR-15 rifles chambered in 5.56x45mm NATO. It will fit any AR-15 with a standard magazine well.
The patented anti-tilt roller follower keeps rounds aligned as they feed, reducing binding and tilting that can cause feeding issues. This is especially valuable when running your rifle hard or in suppressed configurations.
Yes. ProMag manufactures the RM20 in the USA.
A 20-round mag is lighter and more compact than a 30-rounder, making it ideal for hunting where you prioritize maneuverability, or for sport shooting where reloads keep the course interesting. It's a solid middle ground for shooters who don't need maximum capacity.
SKU: 115692707 • Width: 2.6in • Height: 0.8in • Depth: 5.5in • Weight: 0.25oz