Herrington Arms HA P365 X Macro Magwell Flat Dark Earth. Size is an important requirement for us because we wanted them to fulfill a role for concealed carry flat range training competitive/practical shooting and duty for first responders. Keeping this in mind we decided to stick with a mid-sized magwell that is versatile for all roles. Compatibility is also a huge requirement given the firearm that this is designed for. The P365 is an ecosystem that allows for tons of accessories and different configurations so magwell had to fall in line with that. We made this compatible with the X Macro frame from SIG due to them being the most popular frames for this platform. magwells are constructed of light yet durable aircraft grade 7075 aluminum to withstand use from metal P365 mags and for reliability in the roles mentioned above. Specifications for Herrington Arms HA P365 X Macro Magwell: Manufacturer: Herrington Arms Gun Make: SIG Sauer Gun Model: SIG Sauer P365 Features of Herrington Arms HA P365 X Macro Magwell Works well with OEM baseplates and magazines Works with ALL backstrap sizes: Small Medium and Large. WILL ONLY WORK ON X MACRO FRAMES Blems are cosmetic ONLY. They will function as normal NOT COMPATIBLE WITH AXG FRAMES Friendly to most aftermarket P365 mag extensions Compatible with HA P365 mag extensions THIS MAGWELL MAY REQUIRE FITTING DUE THE INJECTION MOLDING PROCESS Package Contents: Herrington Arms HA P365 X Macro Magwell Magwell screw Allen key What firearm models does the manufacturer say Herrington Arms HA P365 X Macro Magwell is compatible with? The manufacturer says that Herrington Arms HA P365 X Macro Magwell is compatible with SIG Sauer P365Herrington Arms HM-365XM-FDE: HA P365 X Macro Magwell Flat Dark Earth