Your local gun shop.
AirsoftGi.com ------- Airsplat.com -------- hobbytron.com
Airsplat or pyramydair
http://shortyusa.com/index.html?RID=4328
Check out http://www.gunsinternational.com/ Gun Classifieds You deal direct with the seller. Best site I have found and I have been at this a long time.
sear
The sear is the part, usually moved by the trigger, that releases the striking mechanism, so that the cartridge is fired.
There are many place to purchase a soldering gun for home use. The best place you can buy a soldering gun for home use is Office Depot. You can also find it online at Amazon.
If you are asking how to fix it: Unfortunately unless you can glue or seal it it, the gun will not work without the Black sear pin. You may have to buy a new receiver half.
That is the part which releases the hammer or striker to discharge the gun.
The best place to get shot by a gun is the Legs, Arms, or Butt No just the arms.
Well at a gun store you know well like I know SEX my favorite!