Pneumatic nail gun

A pneumatic nail gun communicated to a source of compressed gas, comprising a nail-gun main body, a first trigger disposed in the nail-gun main body, an auxiliary handle extended from the nail-gun main body, and an insurance unit disposed at a nail outlet of the nail-gun main body and being capable of shifting between a non-firing location and a location to be fired, characterized in that the pneumatic nail gun further comprises an auxiliary insurance mechanism, and the auxiliary insurance mechanism comprises:

• a second trigger disposed on the auxiliary handle;
• and
• an insurance stopper element disposed in the nail-gun main body, wherein the insurance stopper element is capable of shifting between a first location and a second location as controlled by operation of the second trigger so as to selectively block a shifting path of the insurance unit;
• wherein the user uses one hand to operate the second trigger so as to control the shift of the insurance stopper element to enable the insurance unit to shift to the location to be fired, and the user uses the other hand to operate the first trigger.