11. As the stainless metal could not be parkerized, the gas tubes were given a stove-blackening that frequently wore off in use. 12. Carefully remove the artificial logs to get at the metal gas tubes , and clean the small holes that emit the gas. 13. The AK-74 gas tube has a spring washer attached to its rear end designed to retain the gas tube more securely. 14. The gas tube below the barrel was extended to the full length of the weapon to vent the gas outside the vehicle. 15. Both the standard and Para variants are equipped with a fixed, folding bipod mounted to the gas tube and stowed under the handguard. 16. The status and accessibility of the Burndy collection of gas tubes , vacuum tubes, and electronic artifacts is not clear from the Huntington website. 17. The M1 Garand was one of the first self-loading rifles to use stainless steel for its gas tube , in an effort to prevent corrosion. 18. Accuracy issues were noted since the front sight was mounted on the gas tube in front of the barrel, producing play after sustained fire. 19. The attackers managed to overcome the security personnel and started a fire, which caused the explosions of the two gas tubes inside the building. 20. This advantage is obviated since the gas tube is wired shut with lockwire to prevent the weapon from disassembling itself from vibration in hard use.
