ProMag 50rd Drum Magazine for Sig Sauer P320 – 9mm

The ProMag drum magazine delivers extended capacity for Sig Sauer P320 pistols in a compact polymer drum package. Engineered for range use, competition, and training, it pairs a DuPont Zytel-based polymer body with metal feed components for reliable function. Construction details and materials reflect a design focused on durability and frequent use.

Key Specifications

• Capacity is 50 rounds, providing extended-cycle capability for range and competition sessions.
• Chambering is listed as 9mm, matching the Sig Sauer P320 platform it is specified to fit.
• Designated fit is Sig P320, intended for use with that pistol family.
• Color is specified as Black for a subdued finish.
• The magazine body is constructed from a proprietary DuPont Zytel-based polymer for impact and wear resistance.
• The upper magazine tower is made of blue steel to interface with the pistol feed ramp and slide assembly.
• The follower is injection molded to maintain consistent feeding geometry.
• The magazine spring is formed from heat-treated stainless steel for corrosion resistance and spring life.
• Origin is listed as Made in USA.
• Weight is reported as 1.74 (unit not specified in source data).

Built with robust materials and proven magazine components, this ProMag drum offers a practical solution for users who need extended capacity for training and competitive shooting. Backed by ProMag's stated lifetime guarantee against manufacturer defects, it provides a durable option for high-volume use where reliable feeding and construction matter.