4UANTUM Magnus Pro Precision TDC Hop Up Chamber For UMAREX / GHK Glock 17 G17 Gen5 MOS GBBP showguns ※ Do NOT forced to

※ Do NOT forced to loading more than 120rds BBs

62 type gas magazine

- Manganese phosphate surface treatment

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4UANTUM Magnus Pro Precision TDC Hop Up Chamber For UMAREX / GHK Glock 17 G17 Gen5 MOS GBBP showguns ※ Do NOT forced toFOR AIRSOFT USE ONLY! For GHK G17 Gen5 MOS GBB use ONLY! NOT compatible with GHK G17 Gen3 model. NOT compatible with DCG EMG TTI G34 G34 MOS GBB seires (GHK G17 Gen3 sysetm). Required to DIY ability. The inner barrel and HOP UP bucking are NOT included, which need to be purchased separately. It is recommended with "4UANTUM Friction Pro" HOP UP Bucking. (GBB SPEC.) It is NOT recommended with original GHK HOP UP bucking (rubber). Compatible BB weight