Well, I bent the hell out of the 1/4 grade 8 bolts and almost gave up, until my buddy who is a mechanic said bring the barrel to me, so I did. He drove it out in 2 seconds with an airhammer, I was astonished, so I went out and bought what I thought was an air hammer and tried it on another barrel pin. I peened the crap out of it. Once again I brought it to him peened pin and all, it took 2 seconds. He had a larger air hammer than mine, so if you use this method research the difference and buy the big one. I think he said he paid $45, I paid $15 for mine. Oh and use a blunt tip attachement not the pointed one it will save you some heartache.
