Nail gun

A nail gun, comprising:

• a guide mount consisting of a left half and a right half capable of being locked on a front terminal of a gas/electricity powered driver, said left half being further provided with a guide slot;
• a slide head slidably housed with in said guide mount and consisting of a left half and a right half, said left half being further provided with a guide slot;
• a compressional spring disposed between said guide mount and said slide head for exerting a forward force on said slide head;
• a nail-belt transmission mechanism further comprising a transmission gear wheel with an axial hole, a transmission axle inserted through said axial wheel with a link on one end thereof, a unidirectional ratchet wheel attached on a lateral wall by said transmission gear wheel and a retaining part downwardly interfering with said ratchet wheel, a free end of said link being further provided with an axle, a retaining unit being mounted on an inner wall of an opposite half of said slide head for downwardly interfering with said ratchet wheel, said retaining unit further comprising a block with a hole wherein a spring and a lock pin are disposed;
• and
• an adjustment bracket mounted in a front end of said slide head for adjusting the spacing between said adjustment bracket and said slide head for accommodating nails of different lengths;
• whereby a nail belt will be fed into said driver smoothly.