L9A1

The L9A1 is the British military designation for a Browning Hi-Power. It is a high-capacity semi-automatic pistol chambered in 9x19mm Parabellum.

Info
This weapon (and its ammo) only spawn at British helicoptercrashes. It has the 2nd lowest magazine capacity of the 9x19mm sidearms.

Therefore, it's not all that useful due to the rarity of the crashes. You would be better served with any other sidearm as this is the only one that doesn't have its magazines spawn in buildings.