uod Posted June 27, 2016 Share Posted June 27, 2016 I was unable to find a list compiled anywhere else, so I figured I would start one here in case anyone else is thinking about replacing the stock trigger in a Palmetto State Armory AR-9. If anyone else has dropped a trigger into one of these, please report back with your results. I tried a CMC, and now I have a POF on the way. I'll report on the POF as soon as I get it. CMC 3.5# Drop In Straight Trigger : Not compatible. Hammer follow occurs after the first round fired. If you hold the trigger back while pulling the charging handle, hammer never locks back. CMC is working on a 9mm compatible trigger that should be out in the next 6 weeks.Issue Link to comment Share on other sites More sharing options...
aandabooks Posted June 27, 2016 Share Posted June 27, 2016 Cross Velocity trigger off. Runs full-auto but not reliably and out of battery detonation with case splits. I have a 3.5lb Timney in mine now and through 500+ rounds it has been good. Link to comment Share on other sites More sharing options...
BigBamBoo Posted June 27, 2016 Share Posted June 27, 2016 Had issues with a ELF trigger in my 9mm AR (JP GMR-13 upper). Link to comment Share on other sites More sharing options...
wgj3 Posted June 27, 2016 Share Posted June 27, 2016 The JP trigger in my JP GMR rocks! :-P Link to comment Share on other sites More sharing options...
mrpredictable Posted June 27, 2016 Share Posted June 27, 2016 Rise drop-in trigger works in my AR-9. It's not a PSA though. Link to comment Share on other sites More sharing options...
StealthyBlagga Posted June 28, 2016 Share Posted June 28, 2016 (edited) I run a JP trigger with chopped GI M16 hammer and full-power GI hammer and trigger springs. I have been reluctant to go with lighter springs or non-GI hammer geometry because (1) the resistance of recocking the hammer is an integral component of the blowback retardation system, and (2) the fire control group gets very dirty in a blowback system and when I had a lighter trigger return spring the trigger would not always reset reliably. This trigger setup is heavier than I would like, but is still very short and crisp... I can live with it. Edited June 28, 2016 by StealthyBlagga Link to comment Share on other sites More sharing options...
shooterDrew Posted June 28, 2016 Share Posted June 28, 2016 I put a cmc 3.5# drop in straight trigger in mine and it's worked fine. I've only shot <150 rounds thru it, but no issues so far. I guess I'll keep trying and see how it does. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
bdugger Posted June 29, 2016 Share Posted June 29, 2016 (edited) Had issues with a ELF trigger in my 9mm AR (JP GMR-13 upper). What trigger were you running? And what kind of issues were you having? Edited June 29, 2016 by bdugger Link to comment Share on other sites More sharing options...
bdugger Posted June 29, 2016 Share Posted June 29, 2016 What trigger were you running? And what kind of issues were you having? Link to comment Share on other sites More sharing options...
BigBamBoo Posted June 29, 2016 Share Posted June 29, 2016 I believe it was the match version. The hammer would not reset. Link to comment Share on other sites More sharing options...
bwikel Posted June 29, 2016 Share Posted June 29, 2016 I have 2k rounds on a Timney 3.5# trigger with no issues so far. Link to comment Share on other sites More sharing options...
bdugger Posted June 29, 2016 Share Posted June 29, 2016 I believe it was the match version. The hammer would not reset. Do u want to sell it? Link to comment Share on other sites More sharing options...
uod Posted June 29, 2016 Author Share Posted June 29, 2016 I put a cmc 3.5# drop in straight trigger in mine and it's worked fine. I've only shot <150 rounds thru it, but no issues so far. I guess I'll keep trying and see how it does. Sent from my iPhone using Tapatalk When I called CMC about it, they said that it was very hit or miss on those triggers. Technically, they are not supported in the AR-9 platform, and that is why they are producing a model that has a hammer that is more compatible with the AR-9 bolt. Link to comment Share on other sites More sharing options...
BigBamBoo Posted June 29, 2016 Share Posted June 29, 2016 I believe it was the match version. The hammer would not reset. Do u want to sell it? Sold it awhile back to another member on here. Link to comment Share on other sites More sharing options...
uod Posted June 29, 2016 Author Share Posted June 29, 2016 Just got the POF. Function testing (dry fire) works like a champ so far. I am not experiencing the hammer follow issue when holding the trigger. I'll be able to get it out for live fire on Friday. For the record, this is the POF 3.5# stright drop-in trigger (red body) with the KNS anti-walk pins included. Link to comment Share on other sites More sharing options...
TonyH Posted July 5, 2016 Share Posted July 5, 2016 Hyper-fire trigger worked perfect. Link to comment Share on other sites More sharing options...
photoracer Posted July 6, 2016 Share Posted July 6, 2016 (edited) I custom built my AR-9. I think the bolt is CMMG, its ramped anyway and supposed to work with any AR trigger. I dropped in a Timney 3# out of one of my ARs and its functioned flawlessly in 2 Steel Challenge events. After 2 events I am classed in A in PCCO, and soon to be Master. I flat love shooting PCCO. My barrel is one of the PSA LW SOCOM profile ones. Lower is a QC-10. Edited July 6, 2016 by photoracer Link to comment Share on other sites More sharing options...
Bigsampson Posted July 11, 2016 Share Posted July 11, 2016 The issue on the trigger following is more the bolt than the lower or trigger group. I had a PSA lower with a CMC 2.5# flat hammer that would follow the bolt on most shots. The issue was that the bolt would not push the hammer quite far enough over to reset. TIG welded a very small amount of metal on the back 1/3 of the bottom of the bolt where the hammer rides. Contoured it so it was smooth on all sides but would push the hammer down just a tad more during the cycle. Works perfect. Link to comment Share on other sites More sharing options...
Neil E. Posted July 11, 2016 Share Posted July 11, 2016 That's the problem I had with my CMC. I added 0.030 to the face of the hammer. Problem solved. Link to comment Share on other sites More sharing options...
Nugget Posted July 11, 2016 Share Posted July 11, 2016 I had problems with a hybrid bolt and hyper fire trigger only because I used a buffer spacer. Took out the spacer and the problem went away. Link to comment Share on other sites More sharing options...
spara Posted February 20, 2017 Share Posted February 20, 2017 I wish I had read this before I started my build. The CMC Lantac drop-in trigger doesnt' reset and had a couple of out of battery discharges and case head separations. Still trying to figure out what works reliably. Link to comment Share on other sites More sharing options...
Rub'n Posted February 20, 2017 Share Posted February 20, 2017 PSA Glock lower hiperfire 24c runs like a champ! Link to comment Share on other sites More sharing options...
SM1986 Posted June 14, 2017 Share Posted June 14, 2017 On 6/27/2016 at 5:00 PM, mrpredictable said: Rise drop-in trigger works in my AR-9. It's not a PSA though. Who's lower are you running? I'm interested in this trigger. I'm running a QC10 lower. Link to comment Share on other sites More sharing options...
IHMSA15151 Posted March 18, 2018 Share Posted March 18, 2018 On 2/19/2017 at 5:29 PM, Rub'n said: PSA Glock lower hiperfire 24c runs like a champ! What upper and bolt are you using? All PSA? Link to comment Share on other sites More sharing options...
stick Posted March 18, 2018 Share Posted March 18, 2018 I have all three PSA Lowers (Gen 1, 2, & 3) All run Hiperfire Triggers without any issue Link to comment Share on other sites More sharing options...
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