selector switch issues after car crash

generichandle · December 23rd, 2012, 08:46

Hey guys, so my g&p m4 moe was in the trunk of a car when it got into a car crash (tboned and flipped 3 times, please feel no sympathy it was a friend and as they were drunk driving) and now even when i toggle the selector switch the trigger stays in "safe" ive never opened an aeg but am rather technically inclined.

do you think the selector plate broke or merely disengaged? when i lightly tap the side of my lower receiver while toggling the selector switch i can get it to switch modes, but as soon as i switch back to safe it becomes stuck there again.

AngelusNex · December 23rd, 2012, 08:55

Well it could be that the plate just snapped but judging on the circumstances of its damage, if there is any obvious damage, like the plate, there is probably plenty of unseen damage. I highly advice you get a local gun doc to go over it with a fine toothed comb.

Thinking about it, it could even be that the receiver is warped causing the selector switch to not properly engage the selector plate.

MaciekA · December 23rd, 2012, 09:01

I agree. Something external has probably been damaged if the selector system was able to fail

generichandle · December 23rd, 2012, 09:09

when i have fiddled with it enough to change the firing mode, i managed to be able to shoot, shot off about 100 rounds, gearbox sounded fine, and the accuracy wasn't any different than normal i could toggle between semi and full no problem its just getting it OUT of safe that's the issue.

there's no rattling and i just checked it visually for distortion using a laser, and didn't see any evidence of such. So i really hope its not FUBAR but that's very true and given the circumstances wouldn't surprise me, luckily he had it in HIS pelican case and not in its original box.

lurkingknight · December 23rd, 2012, 12:59

something is bent. Either the mechanical safety portion or the receiver itself. fractions of a mm can make a difference. Multiple rollovers in a car subject anything inside to pretty substantial g forces. Toss your gun case down a set of concrete stairs and see how it does. Probably about the same results even with a padded case.

generichandle · December 24th, 2012, 10:54

update** after dis-assembly and reassembly i haven't found any obviously bent or warped parts. as long as no pressure is applied to the trigger when its in safe it doesnt get stuck in safe mode anymore... will be bringing it to a certified gundoc after the break, whom would youguys suggest in toronto?

generichandle · December 25th, 2012, 09:57

re- disasembled after the continuation of the issue, it would appear some sort of metal bur, (similar to the type found when machining parts a swirlish thin strand.) was behind not the selector plate, but that little nob in-front of it which controls the safety, i removed the shard of metal and buffed the side effected and added a little bit of excess lubricant that came from the inside of the pistol grip when i was removing the motor for dis-assembly, i also tweeked the distance my motor engages at and it is REMARKABLY quieter. although it wasn't too bad before as the teeth on the motor didn't seem to have any issues.

L473ncy · December 25th, 2012, 10:27

Glad you got it working again (and better this time too). I'm thinking if a metal burr got in there who knows what else happened as well, it could be that there's more damage but at least you solved one problem.

I'd check your compression unit where the cylinder and piston are to see if there's any more metal shards or whatever because maybe there's sand or bits of metal in there that will likely chew up your o-ring and mess with your compression down the road (also a good time to put some fresh air seal lube in the compression area as well). As well it's not a bad idea to toss the gears in some degreaser and regrease while you're in the gearbox anyways and who knows if shards of metal got in there as well.

generichandle · January 7th, 2013, 16:31

I'm incredibly perplexed as to where the piece of metal came from as I'm unable to locate any, anywhere else, the one thing I did notice though is that ill need a new inner barrel, it shoots straight for 50feet but after that it's evident they are going slightly to the left, I'm assuming that the stock brass inner barrel just couldn't handle the g's and slightly warped as a result because when I though a friends tight bore in, the problem was corrected. Luckily it appears that it isn't the outter barrel that's toast as I initially presumed. I'm not worried about it until the outdoor season starts at Any rate because It's only off by a foot at150 feet and as of yet that's no problem during indoor season.

Kos-Mos · January 7th, 2013, 17:09

That metal bur was probably from original manufacturing. The hit might have simply shook it loose and in the way of the selector.

As for bent barrel, if it's consistent and not going in a curve to the side, it might just be your sights that are off. The front sight on M4s is a lot easier to knock off than bending the brass inner.

generichandle · January 7th, 2013, 17:24

I'm also assumeing the metal came from original production.Agh! You make an excellent point although if that were the case I don't know why using my friends barrel would have alleviated said issue, but ill try adjusting the angle of the front sight on the outer barrel, as its not a minute enough alteration to achieve via the actual intended sight adjustment (the pin in the sight that can turn)

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December 23rd, 2012, 08:46	#1
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	selector switch issues after car crash Hey guys, so my g&p m4 moe was in the trunk of a car when it got into a car crash (tboned and flipped 3 times, please feel no sympathy it was a friend and as they were drunk driving) and now even when i toggle the selector switch the trigger stays in "safe" ive never opened an aeg but am rather technically inclined. do you think the selector plate broke or merely disengaged? when i lightly tap the side of my lower receiver while toggling the selector switch i can get it to switch modes, but as soon as i switch back to safe it becomes stuck there again.

December 23rd, 2012, 09:01	#3
MaciekA Trader rating Join Date: Jun 2011 Location: Portland, Oregon, USA	I agree. Something external has probably been damaged if the selector system was able to fail __________________ "Mah check" Now you know

December 23rd, 2012, 12:59	#5
lurkingknight "bb bukakke" KING! Trader rating Join Date: Jul 2011 Location: Ottawa	something is bent. Either the mechanical safety portion or the receiver itself. fractions of a mm can make a difference. Multiple rollovers in a car subject anything inside to pretty substantial g forces. Toss your gun case down a set of concrete stairs and see how it does. Probably about the same results even with a padded case. __________________ I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.

December 23rd, 2012, 08:55	#2
AngelusNex formerly Sepulcrum Trader rating Join Date: May 2007 Location: Kingston,ON, aka Funkasia	Well it could be that the plate just snapped but judging on the circumstances of its damage, if there is any obvious damage, like the plate, there is probably plenty of unseen damage. I highly advice you get a local gun doc to go over it with a fine toothed comb. Thinking about it, it could even be that the receiver is warped causing the selector switch to not properly engage the selector plate.

December 23rd, 2012, 09:09	#4
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	when i have fiddled with it enough to change the firing mode, i managed to be able to shoot, shot off about 100 rounds, gearbox sounded fine, and the accuracy wasn't any different than normal i could toggle between semi and full no problem its just getting it OUT of safe that's the issue. there's no rattling and i just checked it visually for distortion using a laser, and didn't see any evidence of such. So i really hope its not FUBAR but that's very true and given the circumstances wouldn't surprise me, luckily he had it in HIS pelican case and not in its original box.

December 24th, 2012, 10:54	#6
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	update** after dis-assembly and reassembly i haven't found any obviously bent or warped parts. as long as no pressure is applied to the trigger when its in safe it doesnt get stuck in safe mode anymore... will be bringing it to a certified gundoc after the break, whom would youguys suggest in toronto?

December 25th, 2012, 09:57	#7
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	re- disasembled after the continuation of the issue, it would appear some sort of metal bur, (similar to the type found when machining parts a swirlish thin strand.) was behind not the selector plate, but that little nob in-front of it which controls the safety, i removed the shard of metal and buffed the side effected and added a little bit of excess lubricant that came from the inside of the pistol grip when i was removing the motor for dis-assembly, i also tweeked the distance my motor engages at and it is REMARKABLY quieter. although it wasn't too bad before as the teeth on the motor didn't seem to have any issues.

December 25th, 2012, 10:27	#8
L473ncy Trader rating Join Date: Oct 2004 Location: 11-30-24-1W5	Glad you got it working again (and better this time too). I'm thinking if a metal burr got in there who knows what else happened as well, it could be that there's more damage but at least you solved one problem. I'd check your compression unit where the cylinder and piston are to see if there's any more metal shards or whatever because maybe there's sand or bits of metal in there that will likely chew up your o-ring and mess with your compression down the road (also a good time to put some fresh air seal lube in the compression area as well). As well it's not a bad idea to toss the gears in some degreaser and regrease while you're in the gearbox anyways and who knows if shards of metal got in there as well. __________________ ಠ_ಠLess QQ more Pew Pew READY TO >> RACE

January 7th, 2013, 16:31	#9
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	I'm incredibly perplexed as to where the piece of metal came from as I'm unable to locate any, anywhere else, the one thing I did notice though is that ill need a new inner barrel, it shoots straight for 50feet but after that it's evident they are going slightly to the left, I'm assuming that the stock brass inner barrel just couldn't handle the g's and slightly warped as a result because when I though a friends tight bore in, the problem was corrected. Luckily it appears that it isn't the outter barrel that's toast as I initially presumed. I'm not worried about it until the outdoor season starts at Any rate because It's only off by a foot at150 feet and as of yet that's no problem during indoor season.

January 7th, 2013, 17:24	#11
generichandle Trader rating Join Date: Nov 2012 Location: Toronto	I'm also assumeing the metal came from original production.Agh! You make an excellent point although if that were the case I don't know why using my friends barrel would have alleviated said issue, but ill try adjusting the angle of the front sight on the outer barrel, as its not a minute enough alteration to achieve via the actual intended sight adjustment (the pin in the sight that can turn)

selector switch issues after car crash

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