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Posted: 6/29/2004 11:39:12 AM EDT
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Do Colt M4s and M4A1s come from the factory with a heavier extractor spring? Or is this some aftermarket modification? Scott |
Speaking of the HD spring and black insert, where can a guy purchase them? I know that SAW sells them, but if I remember correctly, they have a $50 order minimum. I've got a registered M16 in an M4 configuration, but my original Colt M16 bolt has the old-style spring with the red insert. I probably should update it. 
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Which work just fine w/the old blue insert. At laeast all four of mine do  Speaking of red inserts, all the pieces that have come out of CDNN that I've seen comments on seem to have that red one----and I've never seen nor heard of a red insert before that batch from CDNN. Does anyone have any info on the origin/date of those things. I know white was first, then blue. Was red an intermidiate between blue and black? On a hunch I put the red insert, w/the Wolff spring into my class 3 XM177E2 11.5 inch barrel clone, which historially bounces empties off my right ear muff (I'm left handed) last week. Not an ear muf clang all day, so it does something different than the blue one
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| Remember the blue and black insert differ in color only. The black is used to identify the heavier spring. I just ordered springs directly from Wolff and blue inserts from Bushmaster to replace the springs and orange inserts in a bunch of older Colt bolt assemblies. |
Strange, the spring with black insert comes as a package deal thru DOD channels. The D/O ring comes seperate. |
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