Excellent quality
Ordered a Madbull MK18 12.5 inch RIS II and a Holosun HS510C for my GHK M4 V2 via power6air. It arrived at my doorstep two days later, and I could not be happier with the customer service from power6air and DHL, which I chose for express delivery. These items are excellent quality, and were packaged carefully and responsibly by power6air for proper delivery.