AR problem

[rubber duckie]

hey guys,

a couple of months back my buddys RRA 2 stage trigger wouldn't reset after each shot. so since then he got a replacement trigger , and also bought a RRA single stage that he installed in its place. last week we went to the range and he was having FTE and i assumed that since he took apart his piston system to clean that it wasnt set right. since we didnt have any allens at the range we couldnt fix it. today before heading to ontarget he spaced the block correctly. first shot it goes bang. second round in the chamber but when he goes to fire the second round nothing. it turns out the gun will cycle a new round but for some reason it doesnt set the hammer back.

i take apart the upper and lower and i test out the trigger and hammer and everything seems fine. i put the upper back on and charge it and it sets the hammer back and im able to pull the trigger. i head back to the range and same thing happens, it cycles a new round but didnt set the hammer. i pull back the charging handle and see the new round chambered, i pulled it back just enough to manually set the hammer back and it fires. but then again next round chambered and hammer not in firing position. if anyone has any ideas that would be great.

[novalondon]

Without more info your to vague on overall . Handloads?, Shortstroking?, gas system assembled incorrectly?, many things.
What brand weapon, if it is a frankengun whose bolt assembly and whose upper and whose gas system if it is a gaspiston kit and so on. Need more info

[rubber duckie]

spikes lower, RRA LPK, DPMS upper receiver , YHM barrel, adams arms gas piston with the one piece BC, dpms bolt.

the gun ran fine for the first 500 rounds. then he noticed that the trigger wouldn't return after each shot, but it would still be ready to shoot once you flick the trigger forward. he was shooting the last of his PMC that he shot hundreds of rounds before the new single stage trigger.

i havent completely taken the gun apart and check everything. initially i was the one that installed his trigger, and upper. but after it had been cleaned by him and new trigger replaced by him i don't know if everything was put back correctly.

[rubber duckie]

im thinking it has to do with the disconnector spring , i think he didnt install the trigger correctly.

[Droppin Deuces]

If you can manually set the trigger by pulling the charging handle, then the trigger is fine. Perform a function check and see if anything is wrong.

It sounds to me like it's just short sroking. What setting is the regulator on? It should be in the 12 o' clock position. 1 o' clock reduces the amount of gas through the system(it will almost always short stroke), and 3 o' clock is the OFF position, so it won't cycle at all.

[r6raff]

^^^ Short Stroking, first thing that popped in my head with the info you gave.

[rubber duckie]

it is set at 12. now short stroking, isnt that where the BCG isnt pushed back far enough to chamber a new round? well it completely ejects and fired round , and feeds new round in. when i manually charge it it only needs a half pull to get the hammer set. im thinking if it has enough to eject and feed a new round it has to be the trigger.

i found these last night

http://www.calguns.net/calgunforum/archive/index.php/t-302022.html

http://www.thehighroad.org/archive/index.php/t-370732.html

[r6raff]

Did you check the disconnector spring already? It is usually the culprit in a lot of these scenarios. Does this issue only happen when the bolt is cycled by gas? or can you manually rack the bolt and still have this issue? Further, remove the upper and do a full function check and see if you can replicate the issue.

If the issue is present during all those scenarios then the issue most likely rests in your FCG, if the issue only persist while the bolt is cycling with gas, then see the potential for a short stroke type of malfunction

What have you done to try and remedy this problem? More info always help.

[rubber duckie]

i just called him now to make sure he test the trigger. and its exactly what i think.

i told him to charge the gun, pull trigger and hold. charge it again but when he releases trigger.... nothing. he installed the disconnector spring backwards.

thats what happenes when i take his word that it was installed correctly.

[Droppin Deuces]

Nice...

[r6raff]

lol nice, so he wasted an entire 2stage RRA trigger group? or did RRA take his word for it and give him a new one on warranty?

[dieselpower]

I stay away from aftermarket triggers for this very reason. If I can't fix it myself, I dont buy it.

[rubber duckie]

ok update report...

come to find out his new single stage trigger kit did not have a disconnect nor a disconnect spring. i have no idea why i didnt catch it. i knew his trigger group looked different from my 2 stage but i just thought it was due to it being single stage. in my defense i never installed a single stage to begin with or buy a LPK with one. i bought a 2 stage then pieced everything else so i wouldnt have an extra trigger group.

he still has a 2 stage in his gun bag, but the single stage is currently installed. he purchased both 2 stage and single stage from T&A, i told him to go back and get his disconnect and spring, he just said F**K that place. how can they sell him a kit with missing parts... fail.

[rubber duckie]

I stay away from aftermarket triggers for this very reason. If I can't fix it myself, I dont buy it.

well everything in his gun is "aftermarket" it all started from a stripped lower.

[r6raff]

i told him to go back and get his disconnect and spring, he just said F**K that place. how can they sell him a kit with missing parts... fail.

=\ Places mess up, and **** happens. For all we know RRA could have not shipped it with the springs. Also not to come down on you or your buddy, we as weapons owners, especially of ARs and the like have a resposibilty to install/assemble these properly. Had your buddy been paying attention this never would have happened. This is a mistake that never should have been made... upside down I can understand, but how do you assemble an lower and FCG and completely miss the fact that there are 2 springs missing? Now if that shop did the install then yea **** them sideways and stay away, but ultimately they or RRA missed throwing a piece in a bad and your buddy failed to realize that it wasn't there, didnt function check (like you should always do).

Just something to think about.

Again, I mean no offense in anyway, I just believe there is a necessary amount of personal responsibility we all need.