CMMG .22 LR AR-15 Conversion Kit
- Thread starter Melnic
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Understood, its been mentioned earlier in the thread.
I'm happy with it for what its done. Still plan to try it with my scoped 1:9
So far all these rumors people told me (word of mouth at gun shows when asking if people sold them) of key holing at 25yds have been untrue for me.
Sorry, I must've missed that.
My old Ciener conversion didn't keyhole either, but it wasn't anywhere near as accurate as the dedicate upper that I replaced it with.
Try some Aguila SSS - they are 60gr rounds and thus able to tolerate faster twist. Slow to get to the target, but consistent.
Lol if I can find some
I do have some 40g 22LR that I will try with the 1:9 scoped AR
I'm not looking for great accuracy. I ha ether bolt gun for that. It's just for offhand indoor shooting mostly. Chance to take AR to the indoor range in the winter.
Bump
I shot conversion kit in my. AR pistol yesterday indoors @25 yards offhand
Tight groups of 1" with elbow supported just to see how tight things are.
Some stove pipes but admittedly I have not cleaned the bolt in a mint or so and a few outings.
Used Winchester bulk 333
Sorry, no pics except the pistol build I shot it in.
I shot conversion kit in my. AR pistol yesterday indoors @25 yards offhand
Tight groups of 1" with elbow supported just to see how tight things are.
Some stove pipes but admittedly I have not cleaned the bolt in a mint or so and a few outings.
Used Winchester bulk 333
Sorry, no pics except the pistol build I shot it in.
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ar15dave
AR15Dave
I have a CMMG conversion kit with a CMMG 4.5" dedicated 22LR barrel on a standard Keyhole upper, Hogue handguard, with a custom suppressor built by innovative Arms. The picture below shows the upper on my M16. Sent all the parts down to Innovative Arms and had them build the suppressor around the upper. Really quiet and shoots awesome. Eats any make of 22LR ammo I feed it. Mostly standard velocity but, all makes.
Dave
Dave
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This is the best advice I have seen on the topic. The 15-22 is the way to go.
15-22 is definitely cheaper unless you already have most of the part lying around. My rifle built with a 16" Taacon steel barrel did this. 10 shots at 50 yards with CCI SV and a compact 3x scope. Decent IMO. It's reliable and accurate enough for Appleseed.
Not best solution for everyone. For me, With the CMMG conversion, it's quick to go from 22LR from 223 on any of my 223 ARs Plus my dad can borrow it and use it. I have no doubt the $400 15-22 has many happy customers but like the utility of grabbing any of my existing ARs and throwing in the conversion bolt. I also like not having to use up extra space in the safe. I'm sure the 15-22 is a more accurate solution also but I have 2 other 22s that are plenty accurate.
ducrider45
Active Member
Why not just build a dedicated .22LR upper. that solves all of the accuracy issues.
- Feb 4, 2013
- 28,175
Not sure how many times I need to say it.
$220 gets me a package where I can throw it in any of mine or my dad's ARs and shoot 22LR
I'm not reporting accuracy issues as I'm doing everything offhand and accuracy is just fine for my needs. Between me and my dad we have a handful including AR Pistols we can bring to the indoor range and plop this thin in it and go to town. Dedicated upper not needed in my case.
Thanks
ar15dave
AR15Dave
Dedicated upper is nice if you don't mind carrying the extra weight and/or get a custom integrally suppressed one like I did. Otherwise, the 22 conversion kit is the way to go. CMMG is the best in my opinion. I used a CMMG setup, one of their barrels and their conversion kit with a collar, for my suppressed upper build.
Dave
Dave
ar15dave
AR15Dave
Yes you can actually. The end of the 22 Conversion that goes into the chamber can easily be removed and a collar installed to work with a dedicated 22 barrel.
Dave
I have had one from 1987 direct from Jon Ciener. It is all steel and still works with no issues. I recently passed it on to my brothers son and bought a CMMG stainless. The CMMG took some polishing to get it to run right but now it runs as good as my original. The trick is to make sure the rails aren't binding on the bolt ( they will bend when removing the bolt and you may have to bend them back) and keep it wet with 5w20 synthetic motor oil.
In a 1 in 9 twist, 20 inch barrel, I can get 1.5 inch groups from the bench with a scope using 333 or 555 ammo at 50 yards. With a red dot in my 16 inch barrel, it opens to about three inches off hand. That is plenty good for trigger practice.
As for cleaning, you will get some lead build up but it will clean out by shooting a mag of .223 periodically. The only place I need to detail clean is the tail of the bolt and all that takes is a pass on a wire wheel.
As a rule, I only use a bore snake on my guns and don't clean them but once or twice a year or if they start to malfunction. .22 leading in itself has never caused any stoppages for me.
In a 1 in 9 twist, 20 inch barrel, I can get 1.5 inch groups from the bench with a scope using 333 or 555 ammo at 50 yards. With a red dot in my 16 inch barrel, it opens to about three inches off hand. That is plenty good for trigger practice.
As for cleaning, you will get some lead build up but it will clean out by shooting a mag of .223 periodically. The only place I need to detail clean is the tail of the bolt and all that takes is a pass on a wire wheel.
As a rule, I only use a bore snake on my guns and don't clean them but once or twice a year or if they start to malfunction. .22 leading in itself has never caused any stoppages for me.
alucard0822
For great Justice
I have a CMMG kit, runs well, I've only fed it mini mags though. I use it primarily with my competition rifle to practice things on my club's steel target range(pistol caliber only), have even shot a couple steel challenge matches with it. I shut off the gas before shooting 22, and clean it out before shooting 223 again(22 is filthy), it's suprisingly reliable provided it's run wet, and accuracy with my 1-7, 1-8 and 1-9 is acceptable for playing around, maybe an inch or two at 25 yards. It still runs well in milspec rifles, or those without adjustable gas, but I make sure to boresnake it, wipe out the fouling in the reciever, and fire a mag of 223 after every couple hundred 22s. I have other dedicated 22s, and a dedicated upper, but there is no better way to practice with a 223 rifle, optics, rail and all, when a low power caliber is needed.
jimbobborg
Oddball caliber fan
Has anyone here tried it with an original Colt SP-1 or a rifle with a similar twist rate?
I best groups I got with it are with a 20 inch, DPMS 1 in 9 barrel. Since 1 in 16 is the optimum twist for the .22 Long Rifle, I would think that the original M-16 1 in 12 twist should do just fine.
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