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Hello folks, I have an older Colt AR15, 20" barrel, non removable carry handle, A2 stock. My question is, can I simply buy a flat top upper receiver assembly and put it in? How hard would that be? Could I keep my charging handle and BCG? My goal is to eliminate the carry handle and be able to mount optics on it without having to mount it on top of the handle. Is it hard to install?
I was looking at something like this: <broken link removed>
I was looking at something like this: <broken link removed>