ThunderFlash (civvy version of flash bangs)

[Highlander]

Personanly I wouldnt think that you would need very many of them at all,... as you said they are at very best a big noise and a distraction,....after just a few of them have gone off, any attacker will simply not bother about them,... and continue to attack regardless

[Hex]

if your considering using paintball flash bangs you want to be looking at mk9's rather than mk5 (the most popular kinds sold at events and in shops) the mk5's are about as think as a cigar wheras the mk9's are like the ww2 german potato masher grenades and they put off a hell of a lot bigger bang the mk9's are really affective for something baught over the counter.

the other option is crow bangers, theyre actually ment for agriculture theyre quite small so theyre not really noticable and very easy to convert to work on trip wires