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Mine did the same thing. It was dirty.
Are you/him sure that it’s every other round?
Had the same issue with my Grendel. If it's a brand new BCG it needs to be broken in. After about 200rounds it smoothed right out and haven't had any problems since.
More often than not. It’s one of four things.MagazineBuffer springBuffer weightGas flow. Gas port size/ gas port alignment.
Quote from: CAMPMEAT on May 11, 2019, 05:58:47 PMMine did the same thing. It was dirty.It was the first time he shot it but that was my first thought.
Quote from: Eric M on May 11, 2019, 06:26:47 PMQuote from: CAMPMEAT on May 11, 2019, 05:58:47 PMMine did the same thing. It was dirty.It was the first time he shot it but that was my first thought.Mine was not cleaned when I first got it. I just shot it and it was full of crud. Brake cleanered it and oiled it and that was all it took.....
Quote from: Biggerhammer on May 11, 2019, 05:59:12 PMMore often than not. It’s one of four things.MagazineBuffer springBuffer weightGas flow. Gas port size/ gas port alignment.Look who's back! Should we start a count down until your next "vacation"
Quote from: Biggerhammer on May 11, 2019, 05:59:12 PMMore often than not. It’s one of four things.MagazineBuffer springBuffer weightGas flow. Gas port size/ gas port alignment.Look who's back! Should we start a count down until your next "vacation" My suggestion was going to be either the buffer spring/weight or the gas system. They're pretty common issues with home built guns.
Hammer, did you do anything or put a different trigger in the Grendel I got from you ?
Quote from: CAMPMEAT on May 12, 2019, 06:25:08 PMHammer, did you do anything or put a different trigger in the Grendel I got from you ?If I recall correctly, that 26” Grendel had a Rock River 2-Stage National Match trigger. Two or three builds after that one you have. I went to the CMC 2/2 flat shoe triggers.
When people ask me to work on their firearms, the first thing I ask if it’s been cleaned and lubed properly. If both have been done, then yes, bring it in if it’s still not working. My initial thought is a gas issue possibly stemming from gas block misalignment.
Good to see you, BH. I had my build coated in Desert camo. Looks great.
Quote from: pianoman9701 on May 16, 2019, 10:45:33 AMGood to see you, BH. I had my build coated in Desert camo. Looks great.I saw that. Looks great! How may rounds do you have on it now? Still shooting well? Everyone I have put together on a billet upper has shot slightly better than most Mil-Spec forged uppers.
Quote from: pianoman9701 on May 16, 2019, 10:45:33 AMGood to see you, BH. I had my build coated in Desert camo. Looks great.Is there a link to your build PMan?
Quote from: ELKBURGER on May 16, 2019, 11:24:36 AMQuote from: pianoman9701 on May 16, 2019, 10:45:33 AMGood to see you, BH. I had my build coated in Desert camo. Looks great.Is there a link to your build PMan?
Great camo job! Who did it? Is that a Grendel?
Quote from: Biggerhammer on May 16, 2019, 11:07:36 AMQuote from: pianoman9701 on May 16, 2019, 10:45:33 AMGood to see you, BH. I had my build coated in Desert camo. Looks great.I saw that. Looks great! How may rounds do you have on it now? Still shooting well? Everyone I have put together on a billet upper has shot slightly better than most Mil-Spec forged uppers.Off topic so my apologizes, but I need to do a barrel swap from 308 to 6.5CM on a new SP10 I bought and the AR10 platform is a new project for me and I need to get a vise to do the barrel swap. Is there a particular vise you'd recommend???
You can get them fairly inexpensive one on EBay just do a word search for “AR10 upper receiver block”. If you don’t plan on removing and installing a bunch of barrels. If you want the best way to go about it, go with a “Reaction rod” the rod engages the barrel extension and is bullet proof when it comes to serious torque and it does not stress the receiver at all.
Quote from: ELKBURGER on May 16, 2019, 04:00:22 PMGreat camo job! Who did it? Is that a Grendel?It is a Grendel and Sporting Systems sent it out for me to some guy in Gresham. I'm very happy with it.