Sig Sauer MAGMODF4318 P320/P250 18-Round Magazine .40 S&W/.357 Sig - Blued Metal

The Sig Sauer MAGMODF4318 is an 18-round magazine purpose-built for shooters running the P320 and P250 platform in .40 S&W or .357 Sig. Whether you're training at the range, competing, or carrying for duty, a quality spare magazine is non-negotiable—and this one delivers the same uncompromising reliability Sig Sauer firearms are known for. Steel construction and a blued metal finish keep it durable through repeated loading cycles and harsh conditions.

Fit matters in a magazine. Poor tolerances lead to feeding failures and lost confidence when it counts. This mag is engineered to lock securely in full-size P320 and P250 frames with zero wobble, and the 18-round capacity gives you a meaningful round count without unnecessarily heavy or bulky dimensions. Whether you're building a second magazine for everyday carry, stocking spares for the range, or simply ensuring you have a backup that you trust, this is a straightforward, honest component that does one job well.

Sig Sauer magazines have earned their reputation over decades with military, law enforcement, and civilian shooters. This mag upholds that standard with consistent performance and straightforward engineering—no gimmicks, no hype.

Key Features

• 18-round capacity for .40 S&W and .357 Sig
• Steel construction with blued metal finish
• Engineered for secure fit in P320 and P250 full-size frames
• Reliable feeding and proven Sig Sauer quality

Specifications

Frequently Asked Questions

Will this magazine work in my P320 or P250?

Yes. The MAGMODF4318 is designed to fit Sig P320 and P250 full-size frames and locks in securely with reliable feeding of .40 S&W and .357 Sig rounds.

What calibers does this magazine support?

This 18-round magazine is chambered for .40 S&W and .357 Sig.

Is this a steel or polymer magazine?

It's steel construction with a blued metal finish, designed for durability and consistent performance.