Quote:
Originally Posted by Voodoo
To change the spring you need to take your stock off and the front&rear body pin, it take about 15min to do the first time.
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that depends on if your M4's stock bolt goes into the spring guide, or into the backplate of the lower reciver.
mine bolts to the reciver so i just pop the two reciver pins, then the pin (replaced the screw with a pin for quicker removal) that holds the back of the gearbox.