cmmg 22 conversion for AR...........

[Mohawk600]

opinions please.

 

[AZ Refugee]

Great setup. I have a dedicated 22lr upper, same components, runs like it should. Had it about 8 years

 

[lonestardiver]

opinions please.

I acquired a CMMG conversion set awhile back.
4.5” barrel, Bolt and collar for the barrel. Assembled into a standard upper with a 4” carbon fiber handguard. The threaded end of the barrel just stick past the handguard. I put a RDS on it and picked up some Black Dog magazines and a drum. It sits on my SBR lower and run great with the Spectre 2 on it. It will dump a mag as quickly as I can pull the trigger. The drum rocks with non-hollow point bullets. I haven’t fired for groups as it was intended as a blaster. I will do so sometime this winter.

I may eventually set it up on a dedicated lower.

I already had the upper so the only real cost was the conversion kit, the handguard I caught on a clearance sale for $40, and then the magazines.

I need to find a longer barrel and collar so I have other options for range day.

 

[lightflyer1]

I also built a dedicated upper for .22lr use. Swap the upper with my 7.62x39 upper.

 

[Hoji]

Sister has one. Flawless.

 

[Byrd666]

I want one.

 

[rl96ss]

Have the 4.5" setup on a SBR and it has ran great suppressed also.

 

[Dawico]

I hear good things but opted for a dedicated rifle for my daughter. I just couldn't justify the cost compared to buying a whole gun.

M&P22 btw. We really like it.

 

[Moonpie]

Have an old CMMG dedicated .22 upper on a Spike's lower I built out years ago.
Mine has a habit of breaking firing pins so I keep several spares on hand.

 

[baboon]

CMMG's dedicated upper with Black Dog Machine drums run great suppressed or not in my M16.

 

[Tex1961]

I had one for my AR.... Easy, inexpensive, and just plain works..... Be sure to get at least 2 mags as you will be blowing through a lot of .22LR....

 

[V-Tach]

Only drawback if not running a dedicated 22LR upper is that the chamber of your .556 barrel will foul after running .22LR through it and you will be unable to chamber .556 until you clean the chamber....I eventually opted to build a dedicated .22LR upper.......

 

[lightflyer1]

Exactly why I built my upper!

 

[SQLGeek]

Was in the process of building a .22 pistol with one when the prices went to unobtanium levels.

 

[mroper]

I have one as the others with a dedicated upper. Works Great .

 

[Saltyag2010]

Great setup. I have a dedicated 22lr upper, same components, runs like it should. Had it about 8 years

Same story here. I have the 4” barrel that came with the bolt

 

[Mohawk600]

Only drawback if not running a dedicated 22LR upper is that the chamber of your .556 barrel will foul after running .22LR through it and you will be unable to chamber .556 until you clean the chamber....I eventually opted to build a dedicated .22LR upper.......

I decided to go ahead and get one just becasue.

As far as gas blowback and fouling.......I found a source for a neat little 3-D printed thingy that fits in the charging handle channel to mitigate the blowback. The recommendation is that after shooting it as .22LR, put the 5.56 bolt back in and shoot a couple of rounds to "blow it out".