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Phantom M4 RAS w/ Adjustable Rails
Say you want more rails? Then Begadi's Phantom M4 RAS with adjustable rails should do the job for you and you configure the rails to fit whatever weapons accessory you want. You can adjust the rails to any angle, just make sure your M4 doesn't get front heavy with all the attachments. Sometimes rails will tempt you to fill them up with whatever rail-mounted gadget you can lay your hands on.