Franklin Armory's patented Binary Firing System® (BFS™) Glock® 17 Binary® modes to provide reduced split times and tighter groupings. Like all BFS™ triggers, the release round can be cancelled by simply switching back to semiautomatic while the trigger is depressed. Plus, you’ll always know which mode you’re in without having to come off your target with the integrated back plate mode indicator. Perfect for defense, sporting and recreational use. - Glock® 17 Gen3 - Selectable Semi and Binary® (pull and release) - Integrated mode indicator - Optics ready (our adapter plates are sold separately) - Front and rear tritium night sights - High-tactile front and rear serrations - Anti-glare top stripe serrations Binary® Trigger Operation: Position 1 – Semi – Fires 1 round per pull Position 2 – Binary® – Fires 1 round on pull and 1 round on release INCLUDED: 1-LONE WOLF G17 STAINLESS BARREL 1-LONE WOLF G17 GEN3 STAINELESS RECOILROD & SPRING LONE WOLF TIMBERWOLF FRAME 2-19 ROUND AMEND2 MAGS LONE WOLF HARD PISTOL CASE