JCTheSniper, shooting my Del-Ton AR-15, running a CMMG .22 ARC (AR Conversion). It’s a sweet little conversion kit. Drops in in ten seconds or less, and shoots flawlessly, with various types of ammo. This shooting session marks the end of 1000 rounds through the kit, and so far, no failures of any kind. I still haven’t sighted the rifle in for .22, since I’m still shooting .223 with it as well, but the accuracy is good, even at 75 yards, squatting in the snow.
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@JCTheSniper15 Of course, with the kit, it's a different bolt and carrier. lol
@spencer0590 I've used all kinds of ammo in it. The only stuff I've had any trouble with is the really crappy Remington Golden Bullet. Most of the issues with that are just with bad rounds that don't go off, not with the kit. I've had really good luck with federal and winchester.
I'm running a Del-Ton AR with a 16.5 inch M4 profile barrel, Mil-Spec bolt, carrier, and trigger, and no mods.
What kind of .22LR ammunition are u using? Any reccoment for the best cycling from factory?
@KMBrady11 You're welcome. I hope that'll get you taken care of.
@KMBrady11 I'd still say the FTF is just the ammo. .22 tends to do that a lot.
As for the extraction problems, if you feel up to it, you could use a dremel tool to grind the notch where the extractor meets the bolt, and just carefully make it a tiny bit deeper. Several people have said that has fixed their FTE problem. If you don't feel confident doing that though, then you can always take it to a gunsmith, or back to CMMG. Either one should get you squared away.
@KMBrady11 Oh, sorry. It stands for Failure To Extract.
@KMBrady11 Run a mag through it by hand and watch what happens with the extractor. If it's the extractor not grabbing the round, then you should see it let go.
Are you having a significant number of FTE's when you fire it?
Then most likely that's just due to bad cartridges. If the pin is marking the cartridge, then it's not a failure from the kit, it's the ammo. What kind of ammo are you running?
@JCTheSniper15 *handle, not hand.
@KMBrady11 Does it extract consistently when you run the bolt? Like if you were to put a mag in the rifle, and empty it by running the charging handle by hand, does it extract consistently?
@KMBrady11 Of course, it could also be that the ammo you're using isn't shooting hard enough to cycle the kit. Hard to say without more info.
@KMBrady11 … by cutting the notch in the extractor slightly deeper. I've also heard that CMMG has excellent customer service, and they will most likely fix it if you decide it's serious enough to return it.
@KMBrady11 Well, is the firing pin marking the casings? I'd look at the round when you get that failure to fire, because if it's marking the case, then it's just a bad cartridge. That happens a lot with .22lr. If it's not marking the casing, then I'd take the kit out and make sure the firing pin channel is clean and unobstructed.
As for the extraction problem, I've seen some guys in the forums who say that it's due to the extractor not engaging the case well enough. Some have solved it by…
@KMBrady11 I got those so long ago I don't even remember. The cardboard box they came in went away a long time ago.
I had good luck with all of it. No failures at all. I didn't do any sort of precision accuracy comparison between loads, so I can't say about that, but function was flawless with all of the ammo I tried.
@KMBrady11 Yeah… sorry about the sniffling… It was cold!
@KMBrady11 I'd still say the failure to fire is the ammo. That just happens a lot with .22 cartridges.
For the extraction problem, if you feel up to it, you could take a dremel tool and very carfeully grind the notch in the extractor just a tiny bit deeper where it meets the side of the bolt. I've heard several people say that fixed their problem. Or, if you don't feel up to it, take it to a gunsmith or return it to CMMG. Either one should be able to get you squared away.