Metabo HPT NR83AA5M Paper Collated Pneumatic Framing Nailer, 3-1/4"The NR83AA5 Paper Collated Framing Nailer is used for floor and wall framing, truss build up, window build up, construction of subflooring and roof decking, wall sheathing and mobile home and modular home construction. The NR83AA5 is like the original NR83A that you have come to trust, but now with an improved trigger design and sharing all the same internal parts as the original NR83A . The NR83AA5 relies on the same cylinder valve drive system as