Airy brad nailer ATK 0250S

No it is not. It should not leak at all. Where is it leaking air from? The 3 obvious places are the exhaust at the top of the head, the nose where the driver comes down, and the trigger valve.

Do you have a constant air leak at the head of the gun? If so you have a blown diaphram seal. Order from mfg.

Easy fix if air is leaking out the top of gun. Remove the head and lube with white grease or silicone paste. If orings seem to be loose, order repair kit from dewalt (you can tighten orings by removing the oring and wind a bit of teflon tape in the oring groove). If air is leaking from the trigger, replace the valve. If air is leaking out the bottom where the nail ejects, pull out the cylinger and lube the orings that seal the cylinder to the body of the gun.

Most nail guns are labeled with the longest nail/brad they can shoot but are capable of shooting shorter nails/brads. There should be a data sticker on the gun, usually on the magazine rail, or at least in the manual that tells you what pressure to operate the gun at, what guage brads the gun can shoot and the size of brads from shortest to longest it can handle.

A brad nailer in good working order, set to the deepest setting and using 125psi should almost shoot the brad through the wood. If you have been oiling the gun properly (three to four drops at he beginning of your work session and again in the afternoon if under constant use) then you probably have some worn o-rings inside the gun. Porter Cable makes a driver maintenance kit (PN1001 60062) for your gun that will make it work like new.

Open the top where the plunger is...remove the jam and push the plunger back..close up the gun and you should be fine. Make sure you disconnect your air hose first!!!

This is pretty common with brad nailers

Remove the brads from your gun - disconnect from the air supply
On the front of your gun is a latch - open it
Check the sliding surface for build up of dirt or small pieces of metal from the brads.
Once clean polish the surface with a fine steel wool or a small brass brush
Reassemble with a drop of machine oil on the sliding surface
Oil your gun as you normally would
Using a piece of soft wood dry fire the gun 10 or so times to ensure that the dents it is making in the wood are all pretty even
Reload and nail something

ereplacementparts.com. see if they have a schematic for this gun. Good luck sound like a head cap seal.

Airy no longer has a home base in the USA. E-bey might be your best option

18 guage nailer has a very thin driver and plastic cylinder which bends or breaks easily. Remove the head noting all the parts in the head and remove the piston which should be at the top of the cylinder. Check for broken or bent shaft. Most likely broken and jammed in cylinder. Parts are not expensive. Check WWW.toolpartsdirect.com for diagram and parts