entered service in the 1990s, and like its predecessor Python-3, it is integrated with the Elbit Systems DASH (Display And Sight Helmet) HMS system for Israeli F-15s and F-16s, Chilean F-16s (MLU and C/D block 50/52 plus), F-5E/F Tiger III, South American Kfirs and the SAAB JAS 39 Gripen. The missile's seeker is reported to use dual band technology array similar to that of US FIM-92 Stinger (infrared homing and ultraviolet), with IRCCM (IR ECCM) ability to reduce background IR radiation to reduce the effectiveness of enemy flares. Length: Span: Diameter: Weight: Guidance: IR Warhead: , active laser proximity fuse with back-up impact fuse Range: Speed: Mach 3.5 or more Python-5 The Python-5 is currently the most capable air-to-air missile in Israel's inventory and one of the most advanced AAMs in the world. As a beyond-visual-range missile, it is capable of "lock-on after launch" (LOAL), and has full-sphere/all-direction (including rearward) attack ability. The missile features an advanced seeker which includes an electro-optical and imaging infrared homing seeker which scans the target area for hostile aircraft, then locks-on for terminal chase, and a complex design utilizing a total of eighteen aerodynamic surfaces. The Python-5 was first used in combat during the 2006 Lebanon War, when it was used by F-16 Fighting Falcons to destroy two Iranian-made Ababil UAVs used by the Hezbollah. On 13 May 2021, an Israeli F-16 shot down an Hamas operated Shehab suicide drone with a Python-5 air to air missile. Length: Span: Diameter: Weight: Guidance: IR + electro-optical imaging Warhead: Range: > Speed: Mach 4 Other Python developments Derby Also known as the Alto, the Derby missile is a BVR, medium-range (~) active radar homing missile. Though technically not part of the "Python" family, the missile is an enlarged version of the Python-4 with an active-radar seeker. Length: Span: Diameter: Weight: Guidance: Active Radar Warhead: Range: Speed: Mach 4 I-Derby ER In June 2015, Rafael confirmed the existence of the I-Derby-ER, an extended range version of the Derby that increases range to , after a "Python 6" version based on an air-launched Stunner missile was abandoned. To achieve greater range, a dual-pulse solid rocket motor is added, where the secondary pulse of energy as the missile nears the target extends flight time. It also combines the seeker and fuse into an integrated sensor and fusing system to make room for the new motor. In May 2019, it