My order has been in transit for over 80 days and when I tried to contact them via WhatsApp, they never replied. They only replied after I submitted a complaint through PayPal. Then they only provided the tracking information (that I already had) and said to be patient. No other assistance offered or provided. I had to make enquiries from both Chinese and NZ postal offices. Unfortunately, they only point at each other or say to contact the shipper. I am currently trying to get my money back from PayPal, but this appears to be a slow and difficult process. So due to my experience, I can't recommend 6mm. Use at your own risk.
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![[Z-Parts] Aluminum 10.4" HK416 Outer Barrel For SYSTEMA (14mm CW)](http://www.sixmm.com/cdn/shop/products/3_49596151-8ea4-493c-972e-8fb713ea5aeb.jpg?v=1611632131&width=950)