FAB Defense MOJO Improved Mag-Well Mask Vigilante Skull Black. These AR 15 Parts from the visionaries at FAB Defense are crafted from a durable and lightweight fiberglass reinforced polymer to withstand drops and shocks but not weigh you down. Designed as a replacement mask for use with the MOJO Improved Magwell (FX-MOJOB). Customize your firearm with flare with the FAB Defense Vigilante Skull Mag-Well Mask.. Specifications for FAB Defense MOJO Improved Mag-Well Mask Vigilante Skull: Manufacturer: FAB Defense Weight: 0.174 lb 79 g Height: 3.23 in 82 mm Width: 33 mm 1.3 in Length: 90 mm 3.54 in Features of FAB Defense MOJO Improved Mag-Well Mask Vigilante Skull Replaceable grip mask (Vigilante Skull) Quick and easy installation no gunsmith required Durable and lightweight fiberglass reinforced polymer construction Package Contents: FAB Defense MOJO Improved Mag-Well Mask Vigilante Skull FAB Defense FX-MOJO-VIGB: MOJO Improved Mag-Well Mask Vigilante Skull Black