Urutau-SL - SLAP your Urutau

Added a slappable charging handle and multiple other mods for the Urutau, including an Extended Handguard, modified Grip Body and magnetic charging handle retention, plus more. Updated 9/10 with improved Butt Pad. Updated 9/11 with missing Handguard. Updated 9/21 with fixed Grip Body grip mounting hole location. LBRY Tags: urutau; 9mm; bullpup; slap