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Yeah, it was the middle one with the filled in teeth. I knew the last one was supposed to have it when I looked it up online, so I ended up popping off the middle gear after removing the first one and filing down the filled in spot. It takes a little more effort when it gets there, but it works. I'm just going to throw it all back together and test her out.
Now, for the front end of an M4, do I just need a new inner and outer barrel, and a foregrip? Or is there more?
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