Wasted 100 rounds chasing my zero.. somebitch...

[colorider]

Have a factory assembled LMT carbine upper that I have had for a year or so. Put several rounds through it with open sights and a cheap red dot. Figured my accuracy issues were with the fact I was new to the AR platform and the open sights and low quality optic. Well, about 3 weeks ago my wallet puked up money and I bought a Browe BCO acog. The damn thing would not hold zero to save its life. 3 trips to the range and frustration and blaming myself.
Well today I decide to call Browe and ask the owner Brian about sending the optic to him to have them look at it and see what the heck is going on. He said send it in asap and he will have a new one out to me within 24 hours. He then tells me to check my barrel nut. Hummmm,,,,, Barrel nut? Never thought to think of that because I purchased a factory assembled high quality upper and barrel. Well I will be damned, the damn nut was finger tight. How I never noticed this when cleaning it or shooting it I will never know. Kinda pisses me off really. Not even close to torque specs. After removing the gas tube, I spun the nut off by hand. No way this could have happended over time because the way the tube holds the nut in place.

[Gman]

Damn. I can understand why you would expect better than that.

[Great-Kazoo]

LMT isn't the only mfg with hand tight bbl nuts.

[T-Jet]

LMT isn't the only mfg with hand tight bbl nuts.

Who else is doing that ? That's insane.

[ChunkyMonkey]

That's why I brought mine to Jim's garage. While you wait outside, he summons Chuck Norris to hand tight the barrel nut. I just wish mr Norris won't have to leave so quickly... Never had a chance to thank him.

[sniper7]

Building your own is nice. You know how it all went together and that work was done right. Especially in today's market where they were pumping them out as fast as they could go.

[colorider]

The thing is, I got this upper assembly way before any of the panic started. About a year before any sort of crap was going on. I have to say that in a a way I am happy that my $1300 optic is probably not to blame. Have to hit the range tomorrow and make sure that it was the loose barrel. From wiggling it on my bench, it looked to be exactly the amount of wiggle that would cause the amount of zero change I was seeing. Mostly elevation changes. That sucker is torqued down to spec now.

[Mazin]

Building your own is nice. You know how it all went together and that work was done right. Especially in today's market where they were pumping them out as fast as they could go.

I agree 100%



Sent from my Otterbox Defended Tactical iPhone using High Capacity "Clips".

[sniper7]

The thing is, I got this upper assembly way before any of the panic started. About a year before any sort of crap was going on. I have to say that in a a way I am happy that my $1300 optic is probably not to blame. Have to hit the range tomorrow and make sure that it was the loose barrel. From wiggling it on my bench, it looked to be exactly the amount of wiggle that would cause the amount of zero change I was seeing. Mostly elevation changes. That sucker is torqued down to spec now.

Just goes to show you that any brand out there can have its bad apples

[BPTactical]

I have seen numerous factory rifles with loose barrelnuts from the factory. As a matter of fact yesterday a gent was absolutely incensed that I suggested we check it as part of an accuracy issue on his new Les Baer rifle that is a top shelf item.
Just because you paid big bucks for the rifle doesn't mean it wasn't assembled by a $8.00 per hour knucklehead.