「M40A1 VC Piston set」
PRODUCT CODE:645579
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For Sunprojects M40A1(not gas)
This is made of Duralmin.So it would have durability.That has Vacuum system in the head, so BB go straight & far away !
And Spring guide has thrust ring to clear the spin occured twisted spring.
Please use large diameter spring like a APS series.
Sale \6,552
color
screw
Qty

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.