hi guys...im new here...well i been here a lot just reading and a lot more as of late
trying to figure out what if anything is going on with my ar grendel
so to begin...it seems to have an ejection problem...i built this rifle almost a year ago and from the beginning i kinda thought it was under gassed....18" RLGS...i started with a h1 buffer and standard spring...and it was denting the case mouth on ejection and it would do some other things..sometimes not eject..catch a case in the ejectin port..flip one bacwards in the chamber laying on the mag....but it locks back on last round..and is a soft shooter
so i changed to a standard carbine buffer and...i though i had it fixed .....but noooo...it raised its ugly head again...but the case mouth dents are smaller but still there...first round out the other day it jamed it into the front of the ejection port...center of case mouth smashed into the front radious of the ejection port
so i have been reading here for about a week on other issues you guys are discusing and from what i am gathering the 18"RLGS is not optimum for the 6.5 grnedel...volume thing im thinking....kinda think i should have went 20" at this point....i got a 223 that is a twin to this rifle...18"RLGS i built too and it runs like a sewing machine...so has to be something with bigger cal going on.. less volume of gas in the barrel..and short dwell time...yeah im paying attention here fellas
anyway after doing all the reading and seeing what port sizes were or should be i took my rifle apart and here is what i have
took the forearm off and checked for leaks...no sooty spots that i could see..i looked with a good light and i was looking for anything leaking...poop.... nuttin
well i know now...must be a too small gas port or i got the gas block out of alignment...so off it comes....hmmmm...shadow on the barrel says that the gas block was lined up pretty dang good...almost perfect center...so i checked gas port size.... .096 thou goes in but .098 thou does not....so its probably in the .097 thou range... so i check gas tube in gas block alignment...that looks good too..dang that should be working pretty good me thinks....so...poop again
so i checked out the bolt carrier and gas key is tight and staked good...hmmm...no signs of leaking here either...well you know...poop...im running out of things to look at and to maybe fix...other than taking the gas port out to maybe .100+ in size...and i can put it in the mill and do that pretty easy...but i really dont want to unless i have to...but i will no problem
i kinda get too that the 18" RLGS runs better with a can...i really dont want to do that...i like the 18" thing really well... balances well for me and it just fits and feels good....shoulda went with a 20"...lol....hind sight is ALWAYS 20-20
so i ordered a linier compensator...just a cheap one to test out and see if i can get a little more dwell time outa this thing....kinda like maybe a 19" barrel...lol...you know just a little more push back...keep the stuff in there just a tad longer...
i really believe this rifle is right on the ragged edge and just a small nudge could get it over the edge of running ...i dont really want it on the edge i want it to run and run good
i want this gun to be a coyote gun and maybe a deer gun too...i want it to run with 120gr bullets....and maybe a sprinkling of 95gr bullets but those seem to be the real problem child....the problems do seem to show up more with the lighter bullets...
the gun wants to shoot.....and i want it to run good which so far has not happened...but i know it can be a runner...because it has shown me it is a shooter.....it does everything else good...feeds.... loads...locks open....just these pesky ejection things.....they gota go
well there you have it....i think i have covered it pretty well for you all to git in here and tell me your thoughts and where to go....careful !!!!! i have been told where to go a lot...lol...im talking about where i should maybe go with my rifle...lol...or maybe a fix to look at
i think the gas port is ok...but if i need to, i will open it up...but that would be my last option i think
OK....wisdom of the crowd ...i need some input from you fellas and gals if any.....i am a sponge and my ears are open and my mouth is shut...unless you ask a question of course
THANKS
ocharry
trying to figure out what if anything is going on with my ar grendel
so to begin...it seems to have an ejection problem...i built this rifle almost a year ago and from the beginning i kinda thought it was under gassed....18" RLGS...i started with a h1 buffer and standard spring...and it was denting the case mouth on ejection and it would do some other things..sometimes not eject..catch a case in the ejectin port..flip one bacwards in the chamber laying on the mag....but it locks back on last round..and is a soft shooter
so i changed to a standard carbine buffer and...i though i had it fixed .....but noooo...it raised its ugly head again...but the case mouth dents are smaller but still there...first round out the other day it jamed it into the front of the ejection port...center of case mouth smashed into the front radious of the ejection port
so i have been reading here for about a week on other issues you guys are discusing and from what i am gathering the 18"RLGS is not optimum for the 6.5 grnedel...volume thing im thinking....kinda think i should have went 20" at this point....i got a 223 that is a twin to this rifle...18"RLGS i built too and it runs like a sewing machine...so has to be something with bigger cal going on.. less volume of gas in the barrel..and short dwell time...yeah im paying attention here fellas
anyway after doing all the reading and seeing what port sizes were or should be i took my rifle apart and here is what i have
took the forearm off and checked for leaks...no sooty spots that i could see..i looked with a good light and i was looking for anything leaking...poop.... nuttin
well i know now...must be a too small gas port or i got the gas block out of alignment...so off it comes....hmmmm...shadow on the barrel says that the gas block was lined up pretty dang good...almost perfect center...so i checked gas port size.... .096 thou goes in but .098 thou does not....so its probably in the .097 thou range... so i check gas tube in gas block alignment...that looks good too..dang that should be working pretty good me thinks....so...poop again
so i checked out the bolt carrier and gas key is tight and staked good...hmmm...no signs of leaking here either...well you know...poop...im running out of things to look at and to maybe fix...other than taking the gas port out to maybe .100+ in size...and i can put it in the mill and do that pretty easy...but i really dont want to unless i have to...but i will no problem
i kinda get too that the 18" RLGS runs better with a can...i really dont want to do that...i like the 18" thing really well... balances well for me and it just fits and feels good....shoulda went with a 20"...lol....hind sight is ALWAYS 20-20
so i ordered a linier compensator...just a cheap one to test out and see if i can get a little more dwell time outa this thing....kinda like maybe a 19" barrel...lol...you know just a little more push back...keep the stuff in there just a tad longer...
i really believe this rifle is right on the ragged edge and just a small nudge could get it over the edge of running ...i dont really want it on the edge i want it to run and run good
i want this gun to be a coyote gun and maybe a deer gun too...i want it to run with 120gr bullets....and maybe a sprinkling of 95gr bullets but those seem to be the real problem child....the problems do seem to show up more with the lighter bullets...
the gun wants to shoot.....and i want it to run good which so far has not happened...but i know it can be a runner...because it has shown me it is a shooter.....it does everything else good...feeds.... loads...locks open....just these pesky ejection things.....they gota go
well there you have it....i think i have covered it pretty well for you all to git in here and tell me your thoughts and where to go....careful !!!!! i have been told where to go a lot...lol...im talking about where i should maybe go with my rifle...lol...or maybe a fix to look at
i think the gas port is ok...but if i need to, i will open it up...but that would be my last option i think
OK....wisdom of the crowd ...i need some input from you fellas and gals if any.....i am a sponge and my ears are open and my mouth is shut...unless you ask a question of course
THANKS
ocharry
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