ARE THE 92 AND THE PX4 HAMMER SPRINGS THE SAME?

Dimensionally, the hammer springs are the same and will work in the Beretta PX4, M9, 92, and 96 series guns, however they deliver different performance. A 12# hammer spring in a 92/96/M9 would be considered a competition hammer spring, but in a PX4, it would be perfectly suitable for duty or EDC.