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I have a question, is there an issue with running a conversion on your 5.56 upper compared to a dedicated upper? I understand twist rates would probably effect accuracy but anything else?
I was all set to build a dedicated 22lr upper and was gathering pieces when a CMMG Conversion came up and so picked that up as an "in the meantime" sort of thing. Honestly I like it better. With CCI "Tactical AR" ammo it will run 1 to 2" groups at 100yds- possibly better but it was windy last time it was on the range. At 50yds .75 groups are just normal. It seems to run and group better than my buddies DPMS dedicated upper. But the biggest benefit is probably that the gun is not changed otherwise.Weight obviously is slightly changed, but the balance etc. is unchanged so it is truly cheap practice.
Now, I used to HATE the 22 conversions because they were very ammo sensitive and basically sucked, with enough FTF episodes to drive you insane. The newer stuff is MUCH better. I have had maybe 3 FTF's in the last 500 or so rounds, so thats pretty good. Converting between 5.56 and 22lr takes literally 30 seconds if Im slow, requires only an elevation change (about 2") on the scope, and slapping the right mag in. Pretty painless really.
I shot the rimfire event last Saturday with it and it worked perfectly and was great practice and fun!
The accuracy is typically not as good: The twist is not optimum and the bullet make two jumps.Originally Posted by Wildboarem
The lead fouls the gas system.
Lead fouling the gas system? I've never heard of that, thanks for the heads up. Is it a potential hazard to the firearm or just a PIA to clean?
Just a PITA to clean the gas port and gas tube.
I have tried several different 22 LR conversions including the Colt and an AF 22 LR conversion. I had lots of malfunctions with both of these systems. About 15 years ago I had Accuracy Speaks build me a dedicated 22 LR upper. With the right ammo it shoots under 1/2 inch at 50 yards. Two years ago I had a dedicated 5 1/2 inch 22 LR AR upper built for my SBR AR so I could put my GemTech Outback II can on it. It is not as accurate as the Accuracy Speaks upper but I'm not looking for accuracy out of this 22 LR AR. It is fun to shoot and I don't have to wear ear protection when shooting it. It and the S&W M&P AR 22 are what I use when teaching women to shoot an AR.
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