AR Sponsor
Posted: 10/14/2010 6:01:19 PM EDT
|
Just got my upper in the mail... BCM Upper with a BCM BCG.
The BCG came with a little tiny o-ring that's maybe 1/4 an inch in diameter. Where does it go? |
|
The o-ring increases extractor tension. I wouldn't use it unless I had weak extraction issues.
Too much extraction can cause timing issues and lead to malfunctions, not to mention the o-ring could break and gum up something inside the rifle. Thousands of people use the o-ring, thousands do not. Its like deciding to use an Accuwedge (how ever its spelled). |
AR Sponsor