The MTX 365 +3 Magazine Extender improves the grip and capacity of your Sig Sauer P365, transforming your standard pistol into the extended grip length of the P365X/XL. Designed for factory 10-round magazines, this extension is not compatible with 12rd or 15rd magazines or P365X, XL, or Macro frames. Its patented design ensures seamless integration, unmatched reliability, and last-round bolt hold open with its custom-engineered spring. Includes an installation video QR code for easy setup. Specifications for XTech Tactical MTX 365 3 Round Magazine Extender w/Spring: Manufacturer: XTech Tactical Color: Black Magazine Capacity: 3 Round Gun Make: SIG Sauer Gun Model: SIG Sauer P365 Features of XTech Tactical MTX 365 3 Round Magazine Extender w/Spring Adds +3 Rounds to P365 10-round magazines (9mm) Engineered extended spring for consistent feeding Quick installation with detailed video instructions Robust performance backed by innovative, patented design Patents: US 11,408,697 B2 and US 11,168,954 B1 Package Contents: XTech Tactical MTX 365 3 Round Magazine Extender w/Spring Which weapon models is XTech Tactical MTX 365 3 Round Magazine Extender w/Spring compatible with? XTech Tactical MTX 365 3 Round Magazine Extender w/Spring is compatible with SIG Sauer P365