The best only gets better! The Pro Preferred Brand of Pneumatic Nailers introduces an addition to the durable A5 Series tools, with the 3-1/4" 21° Pneumatic Framing nailer with aluminum magazine, model NR83A5S1. It offers the same features and performance as the legendary NR83A5 but its now equipped with an Aluminum Magazine. This new Aluminum magazine shares many components with the classic steel magazine including the ribbon spring. This nailer relies on the same cylinder valve system as the original model from the 80's, providing rapid response and high driving power.