That's a logical fallacy (appeal to authority). One needn't experience to be able to comment, or to be correct. SAA said the gunner and commander bailed due to sights being damaged. Other than direct blast damage to the external sights when there's no armor perforation, internal damage to batteries and wiring is one of the other causes I've heard of; albeit, I've only read about it on one M1 that lost power from a non-perforating FFAR hit to the rear of the tank. By all means provide another explanation for their statement. The pictures shows the GPS intact in comparison to other pictures that have shown it destroyed. SAA implied that the gunner and commander were at fault; whilst "noob" might seem offensive to you, it's not to me. If I panicked and bailed, I wouldn't mind anyone calling me one. Your implication that you need direct experience to comment is again, an appeal to authority. If all we did was limit discussion to "to those with experience", such as crewmen, direct engineers, or factory workers, then we'd have a far smaller userbase than we already do. RE: M1A1M with different barrel. The video implied they were the same. There's nothing saying the barrel could have been replaced when it was undergoing repairs; it gave no time frame. They could also be different tanks, which is something I never implied couldn't be the case.