FORT BENNING, Georgia -- Army Rangers here are evaluating three Mystery Ranch backpack variations by jumping out of U.S. Air Force C--130 Hercules aircraft.The three commercial off the shelf variants tested by Soldiers with the 75th Ranger Regiment's 3rd Battalion included an Assault Pack, Patrol Pack, and Recce Pack.Forty-seven Soldiers from the 75th Regimental Special Troops Battalion conducted 45 static line infiltration training jumps on Benning's Fryar Drop Zone, using the backpacks as part of their combat equipment load.The new backpacks range from 3,200 cubic inches for the Assault pack to 6,200 cubic inches for the Recce pack, according to Lt. Col. Dave Dykema, with the U.S. Army Operational Test Command's (OTC) Airborne and Special Operations Test Directorate (ABNSOTD) based at Fort Bragg, North Carolina.He said the new backpack variations provide modularity to support various mission requirements not supported by the Army's legacy All-purpose Lightweight Individual Carrying Equipment (ALICE) backpack."The ABNSOTD was professional and user friendly," said Capt. Joshia Auerbach, the 75th's Regimental Air Officer."They responded to our need rapidly, and tested the equipment in a manner that was quick and efficient for the Ranger Regiment, expertly incorporating testing into our training schedule.""These rucksacks provide a modern load carrying solution that can now be certified for static line airborne operations," said Staff Sgt. Jake Leveille, 75th Regimental Air NCO.Spec. Thomas Lewis, Squad Rifleman, said he understood the importance of operational testing the new backpacks."Participating in this test provided me with insight on how the Army ensures our equipment is safe and suitable, before fielding it to the force," he said."Soldiers enjoy getting involved in training hard during operational testing," said Dykema."They have the opportunity to operate and offer up their own suggestions on pieces of equipment that can impact development of systems that future Soldiers will use in support of combat missions," he added.Highly-instrumented test drops help test overall survivability of equipment used during airborne operations, according to Dykema.~~About the Airborne and Special Operations Test Directorate:The Airborne and Special Operations Test Directorate (ABNSOTD) at Fort Bragg, North Carolina -- whose lineage traces directly back to the original Parachute Test Platoon of 1940 -- is home to the U.S. Army's only operational test paratroopers, who conduct operational testing for joint airborne contingency and Special Operations Forces in support of the acquisition decision-making process. To provide airdrop certification of all airborne and airdropped equipment, ABNSOTD plans, executes and reports on its operational tests and field experiments, which impacts doctrine, training, organization and materiel.As the Army's only independent operational tester, the U.S. Army Operational Test Command at Fort Hood, Texas is celebrating "50 Years of Operational Testing," which began Oct. 1, 1969. The unit enlists the "Total Army" (Active, National Guard, and Reserve) when testing Army, joint, and multi-service warfighting systems in realistic operational environments, using typical Soldiers to determine whether the systems are effective, suitable, and survivable. OTC is required by public law to test major systems before they are fielded to its ultimate customer -- the American Soldier.