Shipping Notice for USA Customers UPDATED 9th Nov., 2025
Due to recent updates in the tariff policy by the U.S. government, shipments from the UK to the USA may incur duties or import taxes, ranging from 20% to 40% of the total value. As a result, we will mark most items at 50% off of the original order value. In order to minimize the import duty charges, we will take steps that we hope will not cause any issues for you.
![[Z-Parts] 13.5 inch Handguard for for VFC M4 GBB Rifle (Dark Earth)](http://www.sixmm.com/cdn/shop/products/1_37e600ce-abca-4df5-b610-423eff82f774.jpg?v=1611807015&width=950)
![[Z-Parts] 13.5 inch Handguard for for VFC M4 GBB Rifle (Dark Earth)](http://www.sixmm.com/cdn/shop/products/systema-m4-013-01_89af579c-742d-4c21-b9d6-c3470beb5090.jpg?v=1611807015&width=950)
![[Z-Parts] MK16 DD GOV 14.5 inch Steel Outer Barrel for WE M4 GBB](http://www.sixmm.com/cdn/shop/products/1_9cea518e-a884-42d8-825f-8ca944d54040.jpg?v=1611737776&width=950)
![[Z-Parts] MK16 DD GOV 14.5 inch Steel Outer Barrel for WE M4 GBB](http://www.sixmm.com/cdn/shop/products/3_f2df4a4e-4f7e-4311-80ad-589353fa91db.jpg?v=1611737776&width=950)
![[Z-Parts] Mk16 Barrel Nut for KSC M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0150-logo_9a857833-7006-4aaa-bd64-53972deccd00.jpg?v=1611737088&width=950){kind=logo}
![[Z-Parts] Mk16 Barrel Nut for KSC M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0152-log_4044d96f-69d4-4b0f-86bc-3671bd4c8786.jpg?v=1611737088&width=950)
![[Z-Parts] Mk16 Barrel Nut for KJ Works M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0150-logo_b34cc260-c6be-4768-8473-ae44d0324700.jpg?v=1611736921&width=950){kind=logo}
![[Z-Parts] Mk16 Barrel Nut for KJ Works M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0152-log_d0264b20-915a-49f3-914c-da44dde73cb5.jpg?v=1611736921&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for KSC M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/systema-m4-012-01_366cc775-33fe-4c39-b512-e90e172269f9.jpg?v=1611736717&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for KSC M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/systema-m4-012-02_187f2ff3-7739-4d11-ae2c-99e4d6a24163.jpg?v=1611736718&width=950)
![[Z-Parts] 9.3 inch MK16 Handguard for KSC M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/3_0e5756c0-a921-4fdf-b265-971d8c16ef1f.jpg?v=1612157574&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for KSC M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-011-03_c60739d1-5afd-473f-b69b-3c1d61b72bf5.jpg?v=1612157569&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for KJ Works M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-010-01.jpg?v=1611736134&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for KJ Works M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-010-02.jpg?v=1611736135&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for GHK M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/3_3e8b299e-c882-4209-815c-695254208005.jpg?v=1611735937&width=950)
![[Z-Parts] 9.3inch Mk16 Handguard for GHK M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/4_bcd17f7b-d570-488c-82e4-2f6d43ad7db1.jpg?v=1611735937&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KSC M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-011-01_c7ba1b79-c5c7-42ea-bdf4-f1322f47b47c.jpg?v=1611735300&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KSC M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-011-02_33b6a0c4-f0de-485c-9a39-923b4943002b.jpg?v=1611735301&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KJ Works M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/systema-m4-013-01_7d2f9dd5-ec58-420c-9e37-89685d472568.jpg?v=1611735099&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KJ Works M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/systema-m4-013-02_4b914b9c-4689-44da-a7a5-e60aa8461ff1.jpg?v=1611735099&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KJ Works M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-011-01_4889ee15-76ec-499a-b255-b740d0c659d4.jpg?v=1611734915&width=950)
![[Z-Parts] 13.5inch Mk16 Handguard for KJ Works M4 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/systema-m4-011-02_c75fa32f-3692-475f-b6a5-4b6c64e54451.jpg?v=1611734916&width=950)
![[Z-Parts] Steel Bolt for VIPER VI-46 GBB](http://www.sixmm.com/cdn/shop/products/1_01ea976a-7f14-470c-81d7-9b069963b0c3.jpg?v=1611730442&width=950)
![[Z-Parts] Steel Bolt for VIPER VI-46 GBB](http://www.sixmm.com/cdn/shop/products/2_774f5a61-0d8b-4b23-96f8-94413ddfa946.jpg?v=1611730442&width=950)
![[Z-Parts] Steel Bolt Carrier for KSC HK416 GBB Rifle](http://www.sixmm.com/cdn/shop/products/ksc-hk416-002-_1.jpg?v=1611730125&width=950)
![[Z-Parts] Steel Bolt Carrier for KSC HK416 GBB Rifle](http://www.sixmm.com/cdn/shop/products/ksc-hk416-002-_2.jpg?v=1611730125&width=950)
![[Z-Parts] Receiver Set for SYSTEMA 416 AEG](http://www.sixmm.com/cdn/shop/products/vfc-hk416-009-0a.jpg?v=1611726858&width=950)
![[Z-Parts] Receiver Set for SYSTEMA 416 AEG](http://www.sixmm.com/cdn/shop/products/vfc-hk416-009-0b.jpg?v=1611726858&width=950)
![[Z-Parts] Mk16 Barrel Nut for Marui SOPMOD M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0150-logo_541b6d7b-d1c0-4c3f-9569-ed981ca43775.jpg?v=1611651431&width=950){kind=logo}
![[Z-Parts] Mk16 Barrel Nut for Marui SOPMOD M4 GBB Rifle (Tan)](http://www.sixmm.com/cdn/shop/products/img_0152-log_8fc54184-2053-4546-b99e-d7f68f479f1f.jpg?v=1611651432&width=950)
![[Z-Parts] Mk16 10.5inch Handguard for GHK M4 GBB (Green)](http://www.sixmm.com/cdn/shop/products/1_0766d0c3-49e8-4aa8-b69a-cac4b2d3c747.jpg?v=1611650833&width=950)
![[Z-Parts] Mk16 10.5inch Handguard for GHK M4 GBB (Green)](http://www.sixmm.com/cdn/shop/products/2_8d52345a-2b56-4766-97ad-509e159d4b25.jpg?v=1611650834&width=950)
![[Z-Parts] Metal HK416 External For SYSTEMA PTW (Blk 14.5" Barrel)](http://www.sixmm.com/cdn/shop/products/systema-416-004-1.jpg?v=1612807091&width=950)
![[Z-Parts] Metal HK416 External For SYSTEMA PTW (Blk 14.5" Barrel)](http://www.sixmm.com/cdn/shop/products/3_65234d4a-bd4d-4dc8-b086-8c7c3051958e.jpg?v=1612807091&width=950)
![[Z-Parts] DD GOV Alloy 14.5 inch Outer Barrel for SYSTEMA M4 AEG](http://www.sixmm.com/cdn/shop/products/2_fb20ab3b-cfbf-4df5-9acc-817a8c867846.jpg?v=1611648696&width=950)
![[Z-Parts] DD GOV Alloy 14.5 inch Outer Barrel for SYSTEMA M4 AEG](http://www.sixmm.com/cdn/shop/products/outer-barrel001.jpg?v=1611648696&width=950)
![[Z-Parts] CNC Steel 60° 3rds Burst Selector For WA System M4 GBB](http://www.sixmm.com/cdn/shop/products/img_7549-2-logo.jpg?v=1612167307&width=950){kind=logo}
![[Z-Parts] CNC Steel 60° 3rds Burst Selector For WA System M4 GBB[Z-Parts] CNC Steel 60° 3rds Burst Selector For WA System M4 GBB](http://www.sixmm.com/cdn/shop/products/img_7546-2-logo.jpg?v=1612167307&width=950){kind=logo}
![[Z-Parts] Aluminum 14.5" HK416 Outer Barrel For SYSTEMA (14mm CW)](http://www.sixmm.com/cdn/shop/products/1_dd1fef61-ce5e-4219-9f35-4694f9081e35.jpg?v=1611633396&width=950)
![[Z-Parts] Aluminum 14.5" HK416 Outer Barrel For SYSTEMA (14mm CW)](http://www.sixmm.com/cdn/shop/products/3_188dcccf-fb48-4c2b-a61a-f92c1621dbce.jpg?v=1611633396&width=950)
![[Z-Parts] Aluminum 10.4" HK416 Outer Barrel For SYSTEMA (14mm CW)](http://www.sixmm.com/cdn/shop/products/1_e85c32ff-d4e6-4cd3-a2cf-c2cf29f08c98.jpg?v=1611632131&width=950)
![[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)
![[Z-Parts] 3-Prong Type A KAC QDC Steel Flash Hider](http://www.sixmm.com/cdn/shop/products/z-kit-004-01.jpg?v=1611562532&width=950)
![[Z-Parts] 3-Prong Type A KAC QDC Steel Flash Hider](http://www.sixmm.com/cdn/shop/products/z-kit-004-02.jpg?v=1611562532&width=950)
![[Z-Parts] 16.5 inch Steel Outer Barrel for WE MSK/ACR GBB](http://www.sixmm.com/cdn/shop/products/we-acr-004-1.jpg?v=1611562033&width=950)
![[Z-Parts] 16.5 inch Steel Outer Barrel for WE MSK/ACR GBB](http://www.sixmm.com/cdn/shop/products/we-acr-004-2.jpg?v=1611562033&width=950)
![[Z-Parts] 16 inch Steel Outer Barrel for VFC HK417 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/1_24b5192e-3ad2-474f-a60b-fe2101f3466d.jpg?v=1611561820&width=950)
![[Z-Parts] 16 inch Steel Outer Barrel for VFC HK417 GBB Rifle (Blk)](http://www.sixmm.com/cdn/shop/products/2_3f93b1d5-85fb-473b-8287-60a25dfa54a0.jpg?v=1611561820&width=950)
