When evaluating framing nailers, prioritize the power source (Pneumatic, Cordless Battery, or Gas-Actuated). Pneumatic models are preferred for high-volume production due to their reliability and lightweight, while cordless models offer superior mobility. Ensure the tool supports the required magazine angle (typically 21°, 28°, or 30°-34°) to match your local nail collation standards (plastic, wire, or paper). Key performance metrics include a driving depth adjustment for precision and a dry-fire lockout mechanism to prevent internal damage and ensure structural integrity.