that sight will fit but you might want a sight like ethan said so you can see through it with ur mask. however, i once had a red dot sight and i would not reccomend one because they often cant be sighted toward paintballs but only bullets which are more accurate. it's also hard to use a sight when you are being fired at and it is better to just judge off your paintballs and use them as tracers.
Tippmann Custom Pro E-APE Board, RD Centerfeed, DOP Rocket Cock II, Empire 7 pc barrel kit, PE Remote Line/72ci tank, 20/20 Echo , Vents Helix, Centerflag 68/45, Nxe 4+1 pack, Vlocity!
Tippmann Speedball Club #4