Quote Originally Posted by Diamondback View Post
That just a regular M4 RAS under there? I'm assuming the thing behind the FSB is a grenade sight of some kind... these little beasts are almost impossible to find tech data and part lists for.
Just a regular RAS. I'm gonna test how bad the POI shift/accuracy is on that non free float upper is compared to a free float 14.5 and see how the mounted accessories affect it.

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