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Old March 10th, 2011, 10:19   #2
cetane
 
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Join Date: Jun 2010
Location: Markham & Stouffville - Ontario - Canada
A spring from a clicker pen can be made to work. My m4 had no spring for a long time and did not change the function of the gun. Once the mag is inserted it interlocks with the hop up so I don't see why really that spring is there
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