Disclaimer: I am not liable for any injury to you or others, or damage to your airsoft gun or property, as a result of your assembly or use of the gun according to my instructions. Always be safe and be sure to wear eye protection at all times!
Step 1: Materials and Tools
-the G&P challenge kit (Note that not all parts will be used)
-small mallet/hammer (I used a broken mini Maglite- this will get scratched up if you use one)
-punch tool, or a small metal rod around 3" long
-small steel screw with flat bottom, or metal rod described above
-long nose pliers (you might want two, one that's relatively short, and one that's fairly long and is narrow at the tip)
-screwdriver with a good variety of bits, including philips, flathead, and hex in various sizes.
-metal files (small to medium size, nothing more than 1/2" wide should be necessary)
-sprue cutters/wire cutters
-ink barrel from a ballpoint pen
-scrap of paper (not critical, but helps avoid scratching up the receiver/other parts)
-silicone oil lubricant
-Liquid Wrench lubricant (this is what I used for most of the pins, but the silicone oil works fine too). (I would not use WD-40 for any application in this airsoft gun.)
-clean work area (you don't want to be losing any of the smaller parts)