Several pounds depending on the round, however, that’s NOT what the police said. They said, “we are still inventorying, but he had a backpack CAPABLE of carrying around 1000 rounds”.
1000 rounds of .223 if I remember is about 10 lbs or so, maybe a bit more, but it’s pretty heavy, plus if you have magazines for that weapon... quite a bit more. (I’m going from memory, so someone that has a better idea should be able to give a more accurate number)
thanx