SIG 365 Magazine Bases

Conceal Better. Carry Smarter.

The SIG 365 Magazine Bases are engineered for daily use in the SIG 365 pistol platform.

Designed to compliment carrying in a NeoMag, the base features a precision-machined recess that allows your magazine to sit lower in the pocket, reducing printing and enhancing concealment without compromising access. That same recess doubles as a positive grip point, making magazine retrieval smooth and controlled when you need it most.

The SIG 365 Magazine Bases — a purpose-built upgrade engineered to improve concealment, performance, and reliability. Machined in the USA from premium 6061 aluminum and finished with black Cerakote, these magazine bases are built to endure a lifetime of use.

Installation is simple and tool-free. Just use your factory spring and follower — no extra hardware required.

Whether you’re carrying daily or training on the range, the SIG 365 Magazine Bases delivers the concealment, control, and confidence serious shooters demand.

Size and features:

• 17 round magazine in 10 round P365 grip
  • Converts Sig Sauer p365 17-round 9mm magazine to sit flush in a 10-round p365 grip
  • Integrated Neomag-compatible cutout allows deeper more discreet pocket carry and doubles as a grip point
  • Ergonomic front finger groove for improved pinky support and shooting control
  • Direct replacement for factory plastic magazine base – no permanent mods required
• 17 round magazine in 12 round P365 grip
  • Converts Sig Sauer p365 17-round 9mm magazine to sit flush in a 12-round p365 grip
  • Integrated Neomag-compatible cutout allows deeper more discreet pocket carry and doubles as a grip point
  • Direct replacement for factory plastic magazine base – no permanent mods required
• 21 round magazine in 17 round P365 grip
  • Converts Sig Sauer p365 21-round 9mm magazine to sit flush in a 17-round p365 grip
  • Integrated Neomag-compatible cutout allows deeper more discreet pocket carry and doubles as a grip point
  • Direct replacement for factory plastic magazine base – no permanent mods required