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gas ring specs
12/16/2011 4:47:15 PM
Been having some malfunctions, short stroking, in my new build a 25-223.
So last nite i tore the rifle down and went over everything and did a detail strip cleaning. Im running a RRA BCG.
It seems that the gas rings are oversized and drag excessively in the carrier (compared to my stag).
I played the swap game between my stag BCG and the RRA BCG. The RRA bolt is very tight and wont slide into the carrier w/o quite a bit of force, then it SNAPS in, in both carriers where as the stag bolt is tight but very smooth in both carriers.
So i was thinking that maybe the gasrings are buggered up or out of spec. I have ordered new one so i can replace the RRA rings, and hopefully will get out tomorrow and run the rifle with my stag BCG to see if it functions correctly.
So is there a OD spec for the rings? Would bad gasrings cause a shortstroke if they are binding?
thanks
So last nite i tore the rifle down and went over everything and did a detail strip cleaning. Im running a RRA BCG.
It seems that the gas rings are oversized and drag excessively in the carrier (compared to my stag).
I played the swap game between my stag BCG and the RRA BCG. The RRA bolt is very tight and wont slide into the carrier w/o quite a bit of force, then it SNAPS in, in both carriers where as the stag bolt is tight but very smooth in both carriers.
So i was thinking that maybe the gasrings are buggered up or out of spec. I have ordered new one so i can replace the RRA rings, and hopefully will get out tomorrow and run the rifle with my stag BCG to see if it functions correctly.
So is there a OD spec for the rings? Would bad gasrings cause a shortstroke if they are binding?
thanks
12/16/2011 5:07:35 PM
Mine feel the same way. Works fine though.
Maybe try new rings and see. Does your bolt move back and forth tightly when you have it together in the carrier? Or is just tight on reassembly?
Maybe try new rings and see. Does your bolt move back and forth tightly when you have it together in the carrier? Or is just tight on reassembly?
12/16/2011 5:21:37 PM
Ok I don't know if this helps but here is 3 different manufacturers and they all work.
1st is .505 2nd is .51 3rd is .512 and the ring alone (mil-spec) is .51 nearest I can measure.
1st is .505 2nd is .51 3rd is .512 and the ring alone (mil-spec) is .51 nearest I can measure.
12/16/2011 6:10:44 PM
What you want to know is if when the rings are in the bolt carrier is there sufficient end gap.
Your description sounds normal for new components.
Your short stroking is more likely from one of the more traditional causes.
One of which could be too little lube during break in. I have seen this numerous times at the range.
Your description sounds normal for new components.
Your short stroking is more likely from one of the more traditional causes.
One of which could be too little lube during break in. I have seen this numerous times at the range.
12/16/2011 6:34:03 PM
Originally Posted By PFC:
What you want to know is if when the rings are in the bolt carrier is there sufficient end gap.
Your description sounds normal for new components.
Your short stroking is more likely from one of the more traditional causes.
One of which could be too little lube during break in. I have seen this numerous times at the range.
What you want to know is if when the rings are in the bolt carrier is there sufficient end gap.
Your description sounds normal for new components.
Your short stroking is more likely from one of the more traditional causes.
One of which could be too little lube during break in. I have seen this numerous times at the range.
What he said.
12/16/2011 9:42:52 PM
ive got gun dripping oi after shooting whole gun is covered with it, the bolt will not sliide smoothly on either carrier. Again just lookin for something I may have missed need to shoot with other bcg to help diag
12/17/2011 12:41:16 AM
Kind of barking up the wrong tree,
We need to know the OD of the bolt ring channel where they sit in the bolt, then the OD of the carrier gas section on your bolt.
Rings are rings for the most part, and it all comes down to having about .001 gap on the ends of the rings when they are compressed against the bolt channel ring for them when in the carrier gas section (bolt installed into the carrier).
Granted that new rings do have sharp edges, and even a new carrier gas section plating can be rough to cause slight binding when the B/C is now, it's when one of the two specs above at machined incorrectly, and you get too tight of a fit, even with break in.
Also, rings are stamped produced, with one outer edges side rounded, and the other outer edge sides sharp/square. When you install the rings on the bolt, all sharp/square edges of the rings go towards the back of the bolt (butt stock side). The reason for this is that the sharp edge will seal better, will be more likely to grab as the bolt is moving back on lock up than forward on unlock, and do a better job of scraping the carrier gas section walls to clean then on lock up as well.
We need to know the OD of the bolt ring channel where they sit in the bolt, then the OD of the carrier gas section on your bolt.
Rings are rings for the most part, and it all comes down to having about .001 gap on the ends of the rings when they are compressed against the bolt channel ring for them when in the carrier gas section (bolt installed into the carrier).
Granted that new rings do have sharp edges, and even a new carrier gas section plating can be rough to cause slight binding when the B/C is now, it's when one of the two specs above at machined incorrectly, and you get too tight of a fit, even with break in.
Also, rings are stamped produced, with one outer edges side rounded, and the other outer edge sides sharp/square. When you install the rings on the bolt, all sharp/square edges of the rings go towards the back of the bolt (butt stock side). The reason for this is that the sharp edge will seal better, will be more likely to grab as the bolt is moving back on lock up than forward on unlock, and do a better job of scraping the carrier gas section walls to clean then on lock up as well.
