I had seen some of their ads, I thought they were affiliated with Mancraft.
Thanks for sharing, From now onwards I will verify that the seller is authorised.
HI, I am also in search of a good Tech man, I bought an HK M27 Limited Edition online(From Canada https://mach1airsoft.com/product/hk-m27-limited-edition-in-gun-case-elite-force/ ), I am willing to repair the Eyepiece part.