Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > FIREARMS DISCUSSIONS > Rimfire Firearms
Register FAQ Members List Calendar Mark Forums Read

Rimfire Firearms .22, .17 and other Rimfire Handguns and Rifles

Reply
 
Thread Tools Display Modes
  #1  
Old 09-28-2016, 9:41 AM
deviljon's Avatar
deviljon deviljon is offline
Off-roster
CGN Contributor
 
Join Date: Sep 2011
Location: socal 626
Posts: 2,418
iTrader: 153 / 100%
Default Anyone still own a CMMG dedicated AR .22lr upper?

Took my dedicated AR-22 out to the range the other day, but ran into a lot of problems with misfeeds, light strikes, etc.. i'd say 60% of the time it was okay, the other 40% had issues.

Just wondering if anyone still has one and if you've been able to run it consistently without problems? If so, what kind of setup/parts do you have? If not, what parts are you using?

Trying to figure out what's wrong with my rifle. Considering swapping out to an m&p 15/22 if I can't get this to run smoothly but would prefer to get it fixed before having to buy an entirely new gun.

upper:
cmmg dedicated .22lr 16" barrel with stainless collar
stainless steel bolt with forward assist


lower:
new frontier armory polymer lower with blowback hammer
BHOA - bolt hold open actuator
cmmg 10/25 gray magazines
blackdog 10rd magazines


Any input would be greatly appreciated!
Reply With Quote
  #2  
Old 09-28-2016, 9:53 AM
K001 K001 is offline
CGN/CGSSA Contributor
CGN Contributor
 
Join Date: Oct 2014
Location: San Jose, CA
Posts: 165
iTrader: 11 / 100%
Default

deviljon -

The cmmg .22lr WASP upper that I had was equipped with a Taccom 'reliability kit' (extractor, recoil spring, firing pin & spring, bumper) as that seems to be necessary with these uppers to function properly with some lowers.

http://www.taccom3g.com/22rf-reliability-kit.html

Hope this helps ~
Reply With Quote
  #3  
Old 09-28-2016, 9:59 AM
deviljon's Avatar
deviljon deviljon is offline
Off-roster
CGN Contributor
 
Join Date: Sep 2011
Location: socal 626
Posts: 2,418
iTrader: 153 / 100%
Default

^Thanks! What kind of mags did you use?
Reply With Quote
  #4  
Old 09-28-2016, 10:03 AM
K001 K001 is offline
CGN/CGSSA Contributor
CGN Contributor
 
Join Date: Oct 2014
Location: San Jose, CA
Posts: 165
iTrader: 11 / 100%
Default

They were the cmmg 10 rounders with steel feed lips.
Reply With Quote
  #5  
Old 09-28-2016, 10:35 AM
readysetgo's Avatar
readysetgo readysetgo is offline
dRama Lama Ding Dong
CGN Contributor
 
Join Date: Aug 2011
Location: Ventura County, Caught Between My Woman And My Pistol And My Chips
Posts: 5,678
iTrader: 31 / 100%
Default

Maybe take out the BHO and test again, to eliminate that as a source.
__________________


Reply With Quote
  #6  
Old 09-28-2016, 11:39 AM
alpha_romeo_XV's Avatar
alpha_romeo_XV alpha_romeo_XV is offline
Senior Member
 
Join Date: Jun 2006
Location: San Diego North County
Posts: 850
iTrader: 0 / 0%
Default

I'm not sure what you mean by a bow back hammer in the lower. I have the 20" upper and run it on a variety of aluminum lowers which have two stage triggers. Using ten rnd black dog mags and Rem golden ammo it feeds, goes bang and ejects 99%
Reply With Quote
  #7  
Old 09-28-2016, 11:55 AM
gatx105 gatx105 is offline
Member
 
Join Date: May 2013
Location: San Bernadino County
Posts: 235
iTrader: 5 / 100%
Default

The following:

https://www.cmmginc.com/shop/upper-group-mk4-t-22lr/
http://www.redi-mag.com/index.php?l=product_detail&p=52

Lower with PSA lower parts kits
M&P 15-22 magazines

Bolt locks back every time, i shoot all sorts of .22lr through it with out any issues right now, Winchester m-22, Rem golden bullets and thunderbolt, federal auto match, CCI SV, Aguila SV and HV.

All i did was slap on the upper and i was good to go. I am not sure how other BHO kits work, but using the M&P magazines and that kit worked wonderfully, its a mimic now to my normal rifle that i use.
Reply With Quote
  #8  
Old 09-28-2016, 2:51 PM
readysetgo's Avatar
readysetgo readysetgo is offline
dRama Lama Ding Dong
CGN Contributor
 
Join Date: Aug 2011
Location: Ventura County, Caught Between My Woman And My Pistol And My Chips
Posts: 5,678
iTrader: 31 / 100%
Default

Quote:
Originally Posted by alpha_romeo_XV View Post
I'm not sure what you mean by a bow back hammer in the lower. I have the 20" upper and run it on a variety of aluminum lowers which have two stage triggers. Using ten rnd black dog mags and Rem golden ammo it feeds, goes bang and ejects 99%
There was compatibility issue with the NFA polymer hammer, an alternate hammer design claimed to have fixed it.

https://newfrontierarmory.com/shop/l...ower-receiver/
Quote:
*NOTE: Some .22LR, 9mm and other blow back style upper receivers use a groove in their BCG that is too narrow for the polymer hammer that comes standard on the New Frontier Armory LW-15 complete polymer lower receiver. In these cases you will need to switch to a blow back style hammer available by clicking HERE. The blow back style hammer, once installed, will run all rim fire and pistol uppers, and still work fine with standard mil-spec rifle uppers.
Reply With Quote
  #9  
Old 09-28-2016, 3:43 PM
dieselpower's Avatar
dieselpower dieselpower is offline
I need a LIFE!!
 
Join Date: Jan 2009
Location: San Diego
Posts: 10,387
iTrader: 11 / 100%
Default

what ammo? 36gr or 40gr 40gr is the standard to use with most blowback systems, even if 36gr "works"....
Reply With Quote
  #10  
Old 09-28-2016, 4:31 PM
randomBytes's Avatar
randomBytes randomBytes is offline
Senior Member
 
Join Date: Jan 2012
Location: SF Bay Area
Posts: 938
iTrader: 1 / 100%
Default

I have a CMMG .22 upper.
It worked very well at first.
The only real problem I had was with remington golden bullet - which due to shortage was forced to use for Appleseed. By afternoon of 1st day gun was so dirty it became unreliable ;-)
2nd day I cleaned it at lunch time ;-)

At that time the lower had a standard mil-spec trigger (not as bad as some but shocking compared to Geissele trigger in another lower).

At some point the original firing pin broke.
CMMG sent me a new one no problem, but since around that time I've had no end of problems with lite strikes.

I replaced the firing pin with the Taccom one, and added all their other bits,
no real improvement.

I'm currently using a Geissele SSA trigger I would say it is about 60% reliable, again lite strikes are 99% of the problems.
Actually lite strike might be unfair, they often look like they got a decent wack, they just don't go off.

A friend also has GMMG upper, and has never had any trouble with it.
Reply With Quote
  #11  
Old 09-28-2016, 4:33 PM
deviljon's Avatar
deviljon deviljon is offline
Off-roster
CGN Contributor
 
Join Date: Sep 2011
Location: socal 626
Posts: 2,418
iTrader: 153 / 100%
Default

Quote:
Originally Posted by dieselpower View Post
what ammo? 36gr or 40gr 40gr is the standard to use with most blowback systems, even if 36gr "works"....
Using the 36gr federal value pack (525 rds/box).
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -8. The time now is 11:26 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2016, Calguns.net an Incorporated Company All Rights Reserved.