I have some BK Kinetics that are awesome. I just ordered something very similar to these red MCS ammo of yours. I ordered it back on the 16th of this month along with a few FSC upgrade parts from Jaw Droppers. I received notice of shipping labels created on May 22nd. Several emails to and from, and I am still awaiting may purchase. I would love to tell you how the ammo and new stuff works, but I can’t get the man behind Jaw Droppers to just take my package to the darn post office already. I will give you a heads up if any good if I ever get my package.😂😂
Be careful with FPS > 400 in any FSC platform launchers. Lighter weights lead to broken firing bolt pins and that’s no fun. Heavier projectiles will be safer for you in the long run and put out more Joules.