Hey, I have a F model for up in Canada. The sights are the bravo ones, which I'm not too fond of. I want the buckhorn back and the front to be on the gas block. I was wondering if anyone has changed out their plain gas block with a C model gas block that is not a C model rifle? It says PLR16 and C model only on the website, but I would think this is merely because of those models only using that type more than compatibility. What can anyone tell me in way of that? Thanks.