「M40A1 HOP UP Chamber」
PRODUCT CODE:630650
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Made of Brass. It's all machined by CNC machines.This chamber has 3 plates(low, mid & high) to adjust Hop.
If you use the heavy weight BB,you prefer to choice the higher plate. If you use the light BB,you prefer to choice the lower plate.This is for AEG inner barrel or PDI-05(or 01) barrel.Pay attention to NOT use the normal inner barrel.

●それぞれが各弾に最適なHOPをかけます。 ●真鍮製。内部にOリングを入れその上からHOPプレートで押さえ付ける方式
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Please read the below policy
We deem to get your agreement for the below policy when you place an order.
○We couldn't assure the trouble with your lack of skill.
○It may be required to adjust to fit because our custom parts reduce the clearance of normal parts to lead the best condition.
○Do not use the 3rd party products.Because we design with Normal parts or PDI-products.
　If you ignore our rule & breake up your guns、we couldn’t be responsible.
○It is possible to change the spec or design.