Firearms were submitted by Colt, Luger, Smith & Wesson, Savage, Bergmann, Knoble and White-Merrill, but in 1907 Browning's Colt model was selected along with the Savage design. But, upon testing both selected pistols, neither met the Army's desired perfection, so they appointed a selection committe in 1911. Browning remained determined to see his pistol perfected, so he went to the Hartford Colt factory and oversaw production. When Browning submitted the pistol again, it was put through a "torture" test on March 3, 1911. Each gun would fire 6000 rounds in the test. After each 100 rounds, the pistol would be allowed to cool for 5 minutes. After each 1000 rounds the pistols would be cleaned and oiled. After all 6000 rounds, the gun would be tested with deformed cartridges before being rusted in acid and submerged in sand and mud. Browning's handgun passed all of the tests with flying colors, and on March 29, 1911, the Colt-produced .45 automatic pistol was selected as the official sidearm of the Armed Forces of the United States of America and named "Model 1911." This is a gas gun, which means it's powered by gas and doesn't need to be cocked every time. It's fast, clean, inexpensive and easily maintained; it does not require batteries to operate. Also, gas guns are the toughest, most durable of all AirSoft guns. If you're looking for a fun, reliable firearm that'll look great and perform even better, you've come to the right place.