Thread: KA M4: Upgrades from stock form?
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Old April 7th, 2014, 20:41   #31
R.I.T.Z
Crackers
 
Join Date: Mar 2009
Location: The Shwa
No.
Aftermarket spring guides are threaded internally and do not need a nut, KA are cheap plastic, and need a metal nut so the stock screw doesnt strip out
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