WEAPONS
FN FAL rifles
silenced 22lr pistols
TOOLS
A good automatic watch (if all else fails, you can always sell/trade a Rolex)
Leatherman Wave multitool (4th ed mentions a "swiss army knife")
EQUIPMENT
For 4th edition, you should definitely consider the GoPro camera: a tiny but versatile device capable of recording stills, videos and sound. RECON/spy teams need ways of recording and reporting ("a picture's worth a 1000 words" and all that sort of thing)
Pair a GoPro with an android tablet for a security/bugging system
http://www.techrepublic.com/article/...curity-system/
You can also get adaptors for telephoto lenses
http://www.digitaltrends.com/photogr...age-gopro-mod/
For 3rd edition, you could include
bullhorn
spotting scope