1. nope, it wont effect the performance in any way.
2. yeah, it can definatly hit your mask and sometimes the ground or some other object causing your gun to sputter. i would suggest getting one.i have a bottomline on my fish and i have hit my mask a few times and the ground a few times also.
Matrix LE, 12'' boomy, 68/3k crossfire
plz, dont let a loved one wear the brass eagle mask in my avatar. freinds don let friends wear brass eagle.