If you are looking to start a new AR build kit for 300 blackout then check out our exclusive collection of 300 blackout parts available in different color options like black anodized finish along with flat dark earth, olive dab green, burnt bronze, blue titanium and tungsten grey in cerakote finish from Grid Defense. Our most widely used Ghost Vital .300 blackout pistol kit includes M-Lok free float hand guard, charging handle, complete lower parts kit, etc. We, at Grid Defense look forward to providing the tactical industry with the best and most durable 300 blackout build kits at affordable online prices.