Originally Posted by
C4IGrant
You can measure the buffer spring to see if it meets the spec. Another way to test the buffer spring is to take a 30rd mag and load it to capacity. Lock the bolt back and insert the mag. Hit the bolt release and see if it strips a round off the mag. Also make sure that the lugs fully locked. If so, then your spring is most likely GTG.
To test the extractor. I simply use my finger and see if I can easily move it. If you have ever felt the difference between a worn out extractor (or one with a blue insert and 4 coil spring) and an extractor with a 5 coil, CS spring and a black insert, you know when it is worn out.
C4
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