new m4 hop up unit

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Sm0k3Screen
Pawn
Posts: 1
Joined: Sat Mar 07, 2015 6:19 am

new m4 hop up unit

Postby Sm0k3Screen » Sat Mar 07, 2015 6:41 am

hi there i need help trying to buy a new hop up chamber for my G&G M4a1 sportline model i'm willing to spend 20-40 but i don't know which is the best brand my main concern will it fit to the gun with out any modification

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