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 Dboys RIS Picatinny Armor Rail covers 4 pcs set A017 TN  US $16.99
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 Dboys Boyi Bipod Clip Adaptor 20mm RIS Rail For AEG M12 US $10.49
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 Dboys RIS Armor 20mm Rail Plastic Cover 4 Pcs A018 Tan US $16.99
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 ApexTac KAC Style MK18 Navy Seal RIS Rail Hand Guard US $59.95
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 Dboys RIS Picatinny Rail covers 4 pieces set A020S US $15.99
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 Dboys RIS Black Picatinny Rail Cover 4 pieces set A020B US $15.99
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 Dboys QD Quick Release 20mm Rail Vertical Grip M121 US $11.99
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 Dboys RIS Picatinny Armor Rail covers 4 pcs set A019B US $16.99
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 Dboys Boyi Quick Release For 20mm Rail Fore Grip Bi 21 US $12.99
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 DBoys DBAL I Type w 20mm RIS Mount Battery Case Bi 51 US $44.99
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 Dboys Boyi Tactical 20mm Picatinny Rail Fore Grip Bi 21 US $13.99
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 DBoys Tactical DBAL I Type RIS Mount Battery Case Bi 51 US $43.99
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 Dboys RIS Armor 20mm Sand Rail Covers 4 pcs set A018S US $16.96
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 Dboys RIS Armor 20mm Sand Rail Cover 4 pcs Set A020S US $17.99
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 Dboys RIS Armor 20mm Sand Rail Covers 4 pcs set A017S US $16.49
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 DBoys Tactical Airsoft AEG RIS Mount Battery Case Bi 09 US $20.99
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Can I put my plastic box for a gearbox metal?
Ok I have a M4A1 RIS DBOYS BOYI VERSION. Its OK, some shoots 250 FPS. But there is a way you can update the box with a plastic gearbox, metal? Oh, and I will use a wooded area ... PS: Is there a way to update my spring M16 metal inner Barell it more difficult to shoot. Thank you
A new gearbox will cost approximately $ 40 minimum. It is necessary to achieve half of offenders did not fit in properly, ie, the rest of them will not. Then you'll be out much longer than would the cost of having a brand new, good quality airsoft gun. If you find one that is compatible. but you do not. Your best option is to buy a new airsoft gun quality.
