i do not own a bushmaster yet ha ha . maybe in a couple of weeks. question. lets say i buy a bushmaster v match in a 23 inch barrel with a scope or a A3 20 inch barrel then down the road i decide to buy a 16 inch lower kit with some type of scope. my question is this. when i switch lowers back and forth do i have to re-sight my gun in every time i make the switch or will there be a good enough match that it will be right on the money and i will not need to re-sight. thanks. marty. [email protected]

You should not need to. The scope is mounted on the upper.

Once you have a lower (the part where the magazine goes into the weapon) then you can attatch as many different uppers (the part that contains the bolt) to the lower as you would like without problem.

Optics are mounted to the UPPER of the weapon. Scopes loose "zero" because their position has been changed in relation to the barrel. But since the scope stays with the upper when it comes off, there is no real movement of the scope. So it should remain zeroed and ready to go...