Availability: In Stock
The ProMag COLA18B is a 30-round detachable magazine built for AR-15 and M16 platforms running .223 Rem. or 5.56x45mm NATO. If you run an AR and want reliable, cost-effective magazines that won't break the bank, this is solid backup—or primary—ammunition storage. Constructed from DuPont Zytel polymer, it's engineered to handle the rigors of regular use while keeping weight and expense down compared to aluminum alternatives.
The magazine's heat-treated chrome-silicon wire spring pairs with an injection-molded follower to ensure consistent, dependable feeding cycle after cycle. Polymer magazines have earned their place in the AR platform ecosystem: they're proven to work, they don't corrode, and they're light enough that carrying a few extras doesn't slow you down on the range or in the field.
Whether you're stocking up for a day at the range, building out a patrol rifle, or just want spares for your duty or hunting AR, the COLA18B delivers straightforward, no-frills functionality. Black finish blends with most AR builds and accessories.
| Brand | ProMag |
| Model | COLA18B |
| Caliber | .223 Rem. / 5.56x45mm NATO |
| Capacity | 30 rounds |
| Material | DuPont Zytel Polymer |
| Spring | Heat-treated Chrome-Silicon Wire |
| Follower | Injection-Molded |
| Finish | Black |
| Platform Compatibility | AR-15 / M16 |
Yes. The ProMag COLA18B is designed for standard AR-15 and M16 platforms and accepts .223 Rem. and 5.56x45mm NATO cartridges.
The COLA18B holds 30 rounds.
Polymer magazines like this one are lighter, won't corrode, and cost less than aluminum alternatives while delivering proven durability and reliable feeding through the same magazine well.
The magazine uses a heat-treated chrome-silicon wire spring paired with an injection-molded follower, both engineered to provide consistent ammunition seating and feeding performance.
SKU: 115730638 • Width: 2.6in • Height: 1.2in • Depth: 7.5in • Weight: 0.3oz
Availability: In Stock
The ProMag COLA18B is a 30-round detachable magazine built for AR-15 and M16 platforms running .223 Rem. or 5.56x45mm NATO. If you run an AR and want reliable, cost-effective magazines that won't break the bank, this is solid backup—or primary—ammunition storage. Constructed from DuPont Zytel polymer, it's engineered to handle the rigors of regular use while keeping weight and expense down compared to aluminum alternatives.
The magazine's heat-treated chrome-silicon wire spring pairs with an injection-molded follower to ensure consistent, dependable feeding cycle after cycle. Polymer magazines have earned their place in the AR platform ecosystem: they're proven to work, they don't corrode, and they're light enough that carrying a few extras doesn't slow you down on the range or in the field.
Whether you're stocking up for a day at the range, building out a patrol rifle, or just want spares for your duty or hunting AR, the COLA18B delivers straightforward, no-frills functionality. Black finish blends with most AR builds and accessories.
| Brand | ProMag |
| Model | COLA18B |
| Caliber | .223 Rem. / 5.56x45mm NATO |
| Capacity | 30 rounds |
| Material | DuPont Zytel Polymer |
| Spring | Heat-treated Chrome-Silicon Wire |
| Follower | Injection-Molded |
| Finish | Black |
| Platform Compatibility | AR-15 / M16 |
Yes. The ProMag COLA18B is designed for standard AR-15 and M16 platforms and accepts .223 Rem. and 5.56x45mm NATO cartridges.
The COLA18B holds 30 rounds.
Polymer magazines like this one are lighter, won't corrode, and cost less than aluminum alternatives while delivering proven durability and reliable feeding through the same magazine well.
The magazine uses a heat-treated chrome-silicon wire spring paired with an injection-molded follower, both engineered to provide consistent ammunition seating and feeding performance.
SKU: 115730638 • Width: 2.6in • Height: 1.2in • Depth: 7.5in • Weight: 0.3oz