The ProMag Glock 21/30 40 Rd. Drum, model number DRM-A37, is a 40-round, 45 ACP caliber black polymer accessory-magazine, designed specifically to fit Glock 21 and 30 models. This product does not include any optic adjustable objective or optic reticle illumination features.
Specs
| Model No. | PMDRM-A37 |
| Model | Glock 21/30 40 Rd. Drum |
| Manufacturer | ProMag |
| Caliber | 45 ACP |
| Capacity | 40 |
| Weight | 1.95 |
