All Terrain Attack Pod The All Terrain Attack Pod ( AT - AP ) , or Pod Attack Walker ( PAW ) , was a tripedal walker that evolved from the AT - PT and AT - TE walkers towards the end of the Clone Wars . They were used by the 96th Regiment , 327th Star Corps , 91st Reconnaissance Corps , 282nd Regiment , 41st Elite Corps , 76th Regiment , 121st Regiment , 212th Attack Battalion , among others . Characteristics . The AT - AP ( All Terrain Attack Pod ) was conceived as a means of transporting a piece of heavy artillery across the battlefront . Its main function was to serve as a mobile gun platform used for shelling enemy positions , rather than attacking troops or other vehicles . It featured highly - advanced targeting systems that led to it being nicknamed the " sniper tank . " Although classified as a two - legged walker , the AT - AP did have a third leg hanging from underneath the fuselage designed to help stabilize the walker . It would extend and deploy at the operator ' s discretion : typically when overcoming rough terrain or firing its main gun . The AT - AP was armed with a mass - driver cannon fixed to the front of the craft , a heavy blaster cannon mounted on a turret ( which had an open - cockpit , making the gunner susceptible to enemy infantry fire ) , and a medium laser cannon at the bottom of the main fuselage . Behind the main weapon ' s gunner ' s saddle was a supply cage filled with tools necessary for repairing any mechanical failure to the walker ' s articulation assembly . History . The Clone Wars . As the Clone Wars raged on , the Galactic Republic ' s army commanders recognized a need to build up and diversify their walker armor . One of the new designs that emerged from the Republic ' s think - tanks was the AT - AP , an artillery walker based off the fore compartment of the AT - TE . Although armored , the AT - AP was too specialized to be used on its own in direct combat . It and other gun batteries of this type would usually be accompanied by heavier equipment , such as AT - TEs , Tridents and HAVw A6 Juggernauts on the battlefield . In the waning days of the Clone Wars , the AT - AP found extensive use in multiple Outer Rim theaters . A great number of these walkers were attached to the 41st Elite Corps in the Battle of Kashyyyk , where they helped defend the city of Kachirho alongside the A6 Juggernaut . They found similar application on planets like Saleucami and Felucia , the former under the command of Stass Allie and the latter with Aayla Secura alongside AT - OTs and ISPs . Later use . During the Galactic Civil War , some of the Galactic Empire ' s AT - APs were manufactured by formerly abandoned factories out on the fringe , leading to Rebel forces hijacking lines and getting some of the walkers . Some AT - APs also fell into the hands of pirates , the Hutt Cartel , and other groups such as the Zann Consortium , leading to skirmishes and outright battles against either Rebels or Imperials . Hutt Palaces were also known to keep the walkers among their stocks of Clone Wars surplus . AT - APs saw extensive use on Kashyyyk , fighting alongside AT - KTs in the ongoing conflict with Wookiee insurgents . Behind the scenes . LEGO has released two versions of the AT - AP Walker with green markings in 2008 and 2014 with set numbers 7671 and 75043 respectively . The AT - AP was also the first " Air Support " vehicle to be available in 2011 ' s Lego Star Wars III : The Clone Wars video game .