ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Magazine springs are precision wound using heat-treated chrome silicon wire and each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality.
Features:
- 40 - Round Capacity
- Heat-Treated Chrome Silicon Wire Spring
- Manufactured & Assembled in the U.S.A.
- Easy Loading
- Rugged Construction
Specifications:
- Caliber: 45 ACP
- Capacity: 40 Rounds
- Color: Black
- Fit: Glock OEM 21
- Manufacturer Part #: DRM-A37
- Model: Drum
- Subcategory: Pistol Magazines
- Type: Magazine