Product description: Brand New Alumimum Alloy Front Bolt Compatible with Tippmann 98 custom A5，X7 And 98 Marker Response Trigger ready.Improve air efficiency and should increase cycle rate.Internal o-ring reduces air leakageTrouble free， design for high fire rateEasy Installation to install.Extremely Durable for long lasting use in any condition Colors: We have RED， BLACK， BLUE and SILVER color， please kindly inform us what color you like， otherwise we will ship any color in random.Thanks for your understanding!