Self-Cocking Cobra Crossbows - Zytel - 80 Lb. -- These outstanding cobra crossbows come with a Zytel frame. The best feature of these cobra crossbows is the self cocking lever in back which makes the usually difficult cocking SUPER EASY! This 80 lb. self-cocking COBRA pistol crossbow with Zytel frame has a fiberglass bow, 3 aluminum bolts, and a safety.