I just finished my BCM 14.5 carbine and took it to the range. I was cleaning it last night and took the extractor out and noticed there was no o-ring. I was under the impression all BCM bcgs had an o-ring. Was I wrong? Thanks, guys.
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I just finished my BCM 14.5 carbine and took it to the range. I was cleaning it last night and took the extractor out and noticed there was no o-ring. I was under the impression all BCM bcgs had an o-ring. Was I wrong? Thanks, guys.
If you buy a BCG it comes with an uninstalled O ring, but they don't put 'em in there. I wouldn't use one. With the new springs and black inserts I've never had a problem with extraction.
You don't want the o ring in there. It's an out dated, idiotic solution to old, overgassed carbines.
"You people have too much time on your hands." - scottryan
Keep that extractor clean with a handy spare and you should have no problems.
"We must, indeed, all hang together, or assuredly we shall all hang separately." -Benjamin Franklin
I was getting FTEs about every 5-10 rounds in my 300blk build that had a BCM BCG in it. The FTEs didn't start until about 400 rounds into the life of the gun. I installed the O ring that came with it and it has run fine since.
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Last edited by connorr93; 02-28-19 at 11:22.
I also noticed a lot of "upgrade" kits include an o-ring. And DD puts what they call an extractor booster in their bolts.
Why would you not want one? Is it bad to have one of these?
O-rings are a band-aid and not required for properly built rifles and carbines. Over time they have migrated into the standard AR world. Their use on SBR's is also rather dubious. I have never needed to use one with a properly built weapon with thousands and thousands of rounds down range.
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Do you know why DD would put them on their extractors?
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