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View Full Version : Tiny blue plastic thing in AR lower parts set


Falstaff
06-17-2010, 7:55 PM
What is it for? I never saw this in Uncle Sam's A2's. I got two spare/emergency part selection kits each had this tiny blue plastic cone shaped piece. I'm wondering if it's some new upgrade I'm supposed to install somewhee?

dawson8r
06-17-2010, 8:11 PM
I think it goes inside the spring that is under the sear.

818gtiguy
06-17-2010, 8:14 PM
It is the extractor spring insert. The blue ones are for Rifle or mid length gas systems, and the black ones are for carbine gas systems. Most spare part kits I seen have the blue ones.....

a308garand
06-17-2010, 8:15 PM
Thats the insert for your extractor spring. It goes inside the spring and helps provide stiffness to the extractor. Blue is used in rifles, black is for carbines. The black colored insert is all around best in any AR.
If you never removed the extractor from the bolt, you may have never noticed it, or it was a black colored insert and easy to miss.:)

Don't run your rifle without it, you will get failures to extract.

technique
06-17-2010, 8:15 PM
extractor insert

thayne
06-17-2010, 8:28 PM
why would an extractor insert be in a lower parts kit?

killshot44
06-17-2010, 11:10 PM
why would an extractor insert be in a lower parts kit?

Not from a LPK. Read again. Yup, extractor...

thayne
06-17-2010, 11:24 PM
Not from a LPK. Read again. Yup, extractor...

The thread title is "Tiny blue plastic thing in AR lower parts set"

Falstaff
06-18-2010, 12:08 AM
ahhh hah, thanks guys. which way should it be oriented in the bolt, pointy end towards the center of bolt, or the other way?