I just finished building a 11.5 in. SBR that has taken me a few years to finish and a lot of $$. Had to use a Daniel Defense bcg because the Bravo Co one wasn't in stock. The rifle wouldn't eject the spent casings at all. I installed the extractor, spring and O-ring from this kit and now the rifle runs flawless. Use the BCM bolt group for your build so you don't have to drop an additional thirty bucks on the upgrade after you allready dumped a lot on your bolt. I do have to say that the DD bolt worked fine in a 16 in. Rifle
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2 of 2 people found the following review helpful:
must-have
May 10, 2012
Reviewer:
LEO in VA
from Salem, VA United States
If your AR starts hiccuping, before doing anything drastic, do two things: clean it, and buy this kit. Those two steps have cured several AR's I have used, both commercial and mil-spec M4's.
At least one of these kits is in my rifle toolbox at all times. Absolutely critical.
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1 of 1 people found the following review helpful:
Great Extractor
April 19, 2012
Reviewer:
William Sutton
from Newton Falls, OH United States
Not to hard to put on my bolt but just use alot of finger pressure to push down on the extractor spring. great quality and shipping was fast Thank you BCM. American made Keep up the great work!
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4 of 4 people found the following review helpful:
fixed WOLF extraction problems
July 13, 2010
Reviewer:
James M
from Wilmington, NC United States
My stock DEL-TON extractor was ripping off the rim of the Wolf casings and causing them to get stuck. I had to knock them out with a cleaning rod. I installed this and haven't had a problem since. I highly recommend this upgrade kit.
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1 of 1 people found the following review helpful:
No ejections
March 26, 2010
Reviewer:
Wesley Davis
from Dayton, WA United States
My AR was not ejecting spent casings at all. I installed this upgrade today and fired a 30 round mag through it as fast as i could and it did not skip a beat. Highly recommend for anyone with this same type of problem.
Best upgrade 
