FLUX DEFENSE Raider 365 Ultralight SBR Stock Arm Black. ( will not work with Aluminum Raider 365. ) Textured and opened up for more surface area. These stock arms come with a removable rubber buttpad. The buttpad absorbs some recoil and provides a more grippy texture. Specifications for FLUX DEFENSE Raider 365 Ultralight SBR Stock Arm: Manufacturer: FLUX DEFENSE Color: Black Stock/Brace Material: Polymer Gun Model: SIG Sauer P365 Gun Make: SIG Sauer Hand: Right Length: 13.5 in Package Contents: FLUX DEFENSE Raider 365 Ultralight SBR Stock Arm FLUX DEFENSE 165-00046: Raider 365 Ultralight SBR Stock Arm Black