Tiger rock gas tube and block kit - Tiger Rock .750 Low Profile Micro Gas Block and Sliver Carbine Length Gas Tube, Assembled (GTC-B, GB01-B)

I order this gas tube and block kit because the price is very reasonable and the gas tube is already black that means I don't have paint it anymore. My order came in on time but there was a small problem, the kit came in without a roll pin. I called Optic planet about the issue and they sent me the missing roll pin after a week time. But with all those issue I will still order items from Optic planet.