The tracking information said "US, Delivery incomplete (recipient not available - recipient notified)". HK Post no longer had the package. USPS never generated a tracking number and I could not initiate and an inquiry with the HK Post tracking number. I asked SIXmm customer service for help, but they just pointed me at USPS. I gave up and never asked for a refund, but SIXmm was nice enough to send an auto-generated email asking for a review.
![[MadDog] Full Steel M4 GBB Internal Parts Set [For WA M4 GBB Series][Ambi]](http://www.sixmm.com/cdn/shop/products/MadDog_FullSteelM4GBBInternalPartsSet_ForWAM4GBBSeries_Ambi_1.jpg?v=1664778905&width=950)
![[MadDog] Full Steel M4 GBB Internal Parts Set [For WA M4 GBB Series][Ambi]](http://www.sixmm.com/cdn/shop/products/MadDog_FullSteelM4GBBInternalPartsSet_ForWAM4GBBSeries_Ambi_2.jpg?v=1664778905&width=950)
![[MadDog] Full Steel M4 GBB Internal Parts Set[For WA M4 GBB Series]](http://www.sixmm.com/cdn/shop/products/MadDog_FullSteelM4GBBInternalPartsSet_ForWAM4GBBSeries.jpg?v=1664779030&width=950)
![[Maddog]Bearing Hammer Pin Set[For WA M4 GBB Series]](http://www.sixmm.com/cdn/shop/products/Maddog_BearingHammerPinSet_ForWAM4GBBSeries.jpg?v=1608734842&width=950)