Posted: 9/27/2015 3:06:07 PM EDT
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So I got a new BCM Recce 16". Yesterday at the range, after about 200 or so perfect rounds, the rifle started short stroking, i.e. empty casings not fully ejecting and getting dislodged in various ways. The short stroking issue happened about 5 times, almost in a row.
I field stripped the rifle and did not notice anything off. I put it back together and fired about 50 rounds without a problem. When I got home, I inspected it closer and noticed the bolt had only two gas rings. I also noticed I could move the extractor with my thumb. There was good tension, but I could move it with my thumb if I applied a decent amount of pressure. I took off the extractor fairly easily and noticed there was no rubber oring that you typically see. I added one and it the extractor back in the bolt. The tension on it with the oring was much stronger, practically unmovable by hand. I have not shot it again yet and I emailed BCM yesterday. Was just wondering if anyone has any ideas. My guess is the lack of the third gas ring caused a small gas leak, perhaps due to the two gas rings overlapping their gaps, and that's when the short stroking happened. All ammo was 5.56 M193, PMC Xtac, American Eagle, and Independence. Rifle was sufficiently lubed up. |
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Couple of questions to help us answer.
1. Did you buy the gun from BCM or another source? Is the bcg marked? 2, What particular ammo were you using when you experienced the problem? That Independence stuff can be crappy. 3. BCM doesn't usually install the O-ring because they use stiffer extractor springs. Gas rings can go pretty quick so it's best to always have spares. They do not need to be staggered. |
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Quoted:
Couple of questions to help us answer. 1. Did you buy the gun from BCM or another source? Is the bcg marked? 2, What particular ammo were you using when you experienced the problem? That Independence stuff can be crappy. 3. BCM doesn't usually install the O-ring because they use stiffer extractor springs. Gas rings can go pretty quick so it's best to always have spares. They do not need to be staggered. 1. It's directly from BCM. 2. It happened numerous times, I am not 100% sure which exact ammo it was out of the brands I mentioned. It is mixed. 3. I figured as such, I just put it on for testing purposes. Can't hurt to have it on. |