Looking at getting into service rifle shooting, as for what is allowed & whats Not. I have a AR15 so what do I need for optics? red dot, open sights, scope? barrel length right now I have a M4 flat top 16" 1-9" twist or would I be better off getting a 20" or even a match bull barrel set up? is there any custom Mod work I can have on it or does it have to be close to stock? if so then I think a bull barrel would be out. just tring to understand what set up I can have.. anything else I will need for shooting?
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