when these first came out, they were the most inexpensive tracer units i could find. i bought 2 for me and my brother. my airsoft group, Rochester airsoft (RAS) uses tracer units for night games, and one night we decided to ambush the other team at there camp sight. i was in charge of signaling the attack, but right when i needed my tracer to work, it failed. epic fail for my whole team, and all because of this tracer. its design is awful, fragile internally, battery's are a pain, no on/off switch, and its just overall not a good buy.
a friend of mine waited, and got the ECHO 1 tracer. blows mine out of the water, its so much better. or you could go with TM, they are crazy too. but save your money, dont waist it on this. you will thank me later.
not too expensive
fit my m16 easily
worked ok (until i needed it too)
battery's are a pain to deal with
not accurate all the time
no on/off switch
not reliable at all
Only reason i gave it one star is because ASGI wont let me give it none. one star is too generous for this tracer.