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.
![[Maple Leaf] Crazy Jet Airsoft Inner Barrel Set [For GBB Series][6.02mm][370mm]](http://www.sixmm.com/cdn/shop/files/Untitled-1_f6de0d1e-af37-4541-845f-82c1c12fd5ae.jpg?v=1693998316&width=950)
![[Maple Leaf] Crazy Jet Airsoft Inner Barrel Set [For GBB Series][6.02mm][370mm]](http://www.sixmm.com/cdn/shop/files/Untitled-2_de8c5d26-f9c2-4cdb-9441-0642b955773b.jpg?v=1693998316&width=950)
![[Maple Leaf] Crazy Jet Airsoft Inner Barrel Set [For GBB Series][6.02mm][220mm]](http://www.sixmm.com/cdn/shop/files/Untitled-1_32910724-cfe5-4b77-a86a-86d750a5c18a.jpg?v=1693997441&width=950)
![[Maple Leaf] Crazy Jet Airsoft Inner Barrel Set [For GBB Series][6.02mm][220mm]](http://www.sixmm.com/cdn/shop/files/Untitled-3_77a263b0-6c55-4b54-b8a5-bca9d17a388f.jpg?v=1693997458&width=950)
![[Guarder] 6.02mm Interchange Barrel [For M16-A1/VN/A2/AUG][Accrual Length][550 mm]](http://www.sixmm.com/cdn/shop/files/1_43612ea1-a5cc-4581-b00e-707516f526d5.jpg?v=1685693373&width=950)
![[Guarder] 6.02mm Interchange Barrel [For M16-A1/VN/A2/AUG][Accrual Length][550 mm]](http://www.sixmm.com/cdn/shop/files/2_9c86d570-37f9-43bc-9229-f08a080faf3e.jpg?v=1685693373&width=950)