I have just finished my first AR build. I wanted to make sure that there was nothing in the barrel from manufacturing (metal shavings or anything). So, I figured that I'd just run my boresnake through it a couple times and call it good. It's a fairly new one. I've only used it a couple times on my .22 rifle. Very difficult to pull through. I assumed it's because I'm a pansy, but, after today, I guess maybe I'm not a complete wuss. It was a Hoppes Viper .22 caliber. I assumed it would fit fine down the 5.56 barrel. Well, I pulled and pulled and I was making no headway. So, I kept pulling. The darn string snapped! It didn't come apart. It snapped. Am I just THAT strong (not likely)? Is it a bad product or just a bad one? Is there another boresanke that I should try? Or should I just go to a one-piece rod? What do you all do?