The Patriot ships with (1) OEM 15 round G19 magazine. They ship in a TSA approved hard sided case. All FX-19 pistols accept GLOCK aftermarket parts, accessories, and magazines. Technical Specifications Slide Faxon Match Series G19 Barrel Machined in-house from 17-4 Stainless Steel Enhanced front, rear, and top serrations Optic cut for Trijicon RMR or Holosun 507C Machined posts in optic cuts for optic locating and recoil absorption Diamond-Like Carbon (DLC) Finish Fiber-Optic Front Sight (Lower 1/3 Co-Witness w/Red Dot)  Frame Custom Faxon PF940C Frame 1911-Style Grip Angle Custom Polished Front & Rear Slide Rails Double Undercut Trigger Guard Extended Magazine Release Overwatch Precision Trigger with NP3 Coated Trigger Bar The FX-19 Patriot & Hellfire are covered under Faxon's Customer Satisfaction Guarantee.