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View Full Version : Parts are falling off my new rifle!


SgtMerc
05-28-2012, 6:08 PM
Greetings everyone.

So, just got my Colt SP6920CA out of jail. Took her home, cleaned her and lubed her.

Headed out to hodge road and laid out a tarp and carpet to shoot in the prone. After about 20 rounds, I got her zeroed. I let my cousin take the next mag, and after he unloaded he pulled out the magazine and noticed a pin sitting on the carpet by his forward elbow. He asked me where it came from, and it didn't look like any pins i'm familiar with.

The only things i did to the rifle were to remove the carry handle, install a scope and red-dot, remove the handguards and replace them with magpul moe.

Here is a picture of the pin, with a .223 for scale. It has no grooves, bumps or gouges, but there looks like there's ALMOST a peen at the tip. It looks like a giant sized extractor pin, tbh.

So, where did it come from, and why are parts falling off my brand new colt? :(

http://img51.imageshack.us/img51/7402/043mg.th.jpg (http://imageshack.us/photo/my-images/51/043mg.jpg/)

http://img560.imageshack.us/img560/2226/057pg.th.jpg (http://imageshack.us/photo/my-images/560/057pg.jpg/)

http://img10.imageshack.us/img10/7957/058flg.th.jpg (http://imageshack.us/photo/my-images/10/058flg.jpg/)

http://img268.imageshack.us/img268/3011/059us.th.jpg (http://imageshack.us/photo/my-images/268/059us.jpg/)

Mossy Man
05-28-2012, 6:12 PM
colt is the a time-tested combat rifle.

any problems they ship with are just your perception because they can't have made a mistake.

CC Gunsmithing
05-28-2012, 6:15 PM
Is that a roll pin or is it solid?

TKM
05-28-2012, 6:15 PM
Check your trigger guard.

SJgunguy24
05-28-2012, 6:17 PM
Check the bolt hold open roll pin.

tonelar
05-28-2012, 6:18 PM
It's not a roll pin. It's solid. I can't find a pin like that on my ARs.

Were you shooting anything before the AR? That looks like a 10/22 receiver pin.

Solidux
05-28-2012, 6:20 PM
From the small pictures, looks like a roll pin from either the bolt catch or trigger guard.

If its solid... hmm... could be the pin that holds the extractor in place on the bolt. Do a thorough functions test of the rifle. (Hold trigger down, charge, let go of trigger, listen for a click. Charge handle, put on safe, try to fire. Charge handle but let bolt sit halfway into the catch, use forward assist to get bolt into battery. Pull out bolt carrier, push the bolt in, fling out outwards to see if bolt comes out into battery. Send picture to colt cs and see what they say)

SgtMerc
05-28-2012, 6:21 PM
it's completely solid, not a roll pin. i thought it might be something off the front sight/gas tube assembly, but that's all solid. the forward sling seems loose now, but i don't recall if it was loose on pickup.

SgtMerc
05-28-2012, 6:24 PM
i wasn't shooting anything else on the carpet before the AR. i was shooting pistol at 7yard, but those were standing and it's way too big for either of my pistols.

did a function test at hodge road, field stripped it and checked the BCG. Not familiar enough with lower receivers to take that down in the field.

Function check was normal. All the regular clicks and clunks.

I probably shouldn't admit this, but since the function check was safe i test fired it and it worked perfectly.

SgtMerc
05-28-2012, 6:26 PM
From the small pictures, looks like a roll pin from either the bolt catch or trigger guard.

If its solid... hmm... could be the pin that holds the extractor in place on the bolt. Do a thorough functions test of the rifle. (Hold trigger down, charge, let go of trigger, listen for a click. Charge handle, put on safe, try to fire. Charge handle but let bolt sit halfway into the catch, use forward assist to get bolt into battery. Pull out bolt carrier, push the bolt in, fling out outwards to see if bolt comes out into battery. Send picture to colt cs and see what they say)

that's what i thought, but it's WAY too big. like, three times the size of the extractor pin.

Ruiner
05-28-2012, 6:29 PM
Check your ejection port cover. That looks like pieces of the hinge pin. Pretty uncommon for it to break, but it does happen.

http://img560.imageshack.us/img560/6346/888007.jpg

SgtMerc
05-28-2012, 6:32 PM
ejection port cover is intact, what looks like a single pin going through the entire hinge.

the pin in the picture is surprisingly big. if you look at the fullsize images, it's almost as big as a .223 bullet itself.

Ruiner
05-28-2012, 6:37 PM
ejection port cover is intact, what looks like a single pin going through the entire hinge.

the pin in the picture is surprisingly big. if you look at the fullsize images, it's almost as big as a .223 bullet itself.

Does it still have the C clip on it towards the front? Check the FCG pins as well.

SgtMerc
05-28-2012, 6:41 PM
yeah. the portion of the hinge pin closer to the d-ring seems to be longer, but there's no damage to the rear portion, and the c-clip is present

Ruiner
05-28-2012, 6:45 PM
yeah. the portion of the hinge pin closer to the d-ring seems to be longer, but there's no damage to the rear portion, and the c-clip is present

Strange... Not a taper pin from your front sight block?

SgtMerc
05-28-2012, 6:45 PM
front of the port hinge pin
http://img37.imageshack.us/img37/7043/068na.th.jpg (http://imageshack.us/photo/my-images/37/068na.jpg/)

rear hinge pin. doesn't look damaged, and the pin that fell off is blued all over.
http://img534.imageshack.us/img534/6164/069ig.th.jpg (http://imageshack.us/photo/my-images/534/069ig.jpg/)

thought it might have come off the front sight assembly
http://img193.imageshack.us/img193/6382/070gq.th.jpg (http://imageshack.us/photo/my-images/193/070gq.jpg/)

and this is the only place i could figure, but the pin is too big for those holes.
http://img542.imageshack.us/img542/8913/071k.th.jpg (http://imageshack.us/photo/my-images/542/071k.jpg/)

SgtMerc
05-28-2012, 6:47 PM
Does it still have the C clip on it towards the front? Check the FCG pins as well.

In my time in service, i never learned about the FCG. What should i be looking for?


Strange... Not a taper pin from your front sight block?

Not sure what you're referring to here, but there don't seem to be any holes in the front sight block besides where a GI-spec front sling swivel would be (at least i think that's what those holes are in my last picture)

ir0nclash86
05-28-2012, 6:53 PM
im not an ar guy but arent there pins like that behind the castle nut plate thing. Is there a pin that holds the selector in?

Ruiner
05-28-2012, 6:54 PM
It definitely isn't from your front sight. That hole you see there for the swivel uses a rivet. On your FCG if you can see all the pins in their holes then you're OK. The left side looks ok from your first pic. Just take a quick look at the right side to make sure they are all intact.

edwardjames
05-28-2012, 6:54 PM
could it have just been a fault at the factory that they may have "accidentally " dropped it into the gun or (handguard) wherever it might have fallen from ?

or possibly left over from a previous trip on the carpet ?

Ruiner
05-28-2012, 6:57 PM
im not an ar guy but arent there pins like that behind the castle nut plate thing. Is there a pin that holds the selector in?

Nah, that would be a small brass pin with a pretty distinctive shape.

psubond
05-28-2012, 7:00 PM
the only piece from the lower that it looks the right size to be is a hammer/trigger pin but it's missing the grooves for that.

Ruiner
05-28-2012, 7:00 PM
could it have just been a fault at the factory that they may have "accidentally " dropped it into the gun or (handguard) wherever it might have fallen from ?

or possibly left over from a previous trip on the carpet ?

This is what I'm thinking as well. He's checked all the areas where a solid pin may be used and those all seem to be intact. The only other thing to check is that stock but I'm not familiar with it at all.

SgtMerc
05-28-2012, 7:04 PM
Ok, i just took a look at the right side of the rifle, and there were no pin holes on the colt. There was a hole on the rail clamp for the optic. I test fitted it, and it was the right size.

took the optic off (ugh. that's gonna be annoying next week) and the pin fit perfectly. I guess it's the manufacturer's method of ensuring there isn't any forward/rear sliding on the rails. the pin protrudes into the lateral grooves of the rail. I don't know if it's necessary, since the clamp holds it to the rail pretty well.

And it'll probably just fall out again.


Thank you all for your assistance with this. This really shows i have to learn the intricacies beyond a military field strip. :facepalm:

SgtMerc
05-28-2012, 7:05 PM
Also, on the stock, that was the stock on the rifle at the store. All the stocks i see on 6920's online are completely different.

tonelar
05-28-2012, 7:07 PM
How about if you slide it into your rail clamp then press it fwd while tightening. Won't that capture the pin?

Ruiner
05-28-2012, 7:10 PM
Ok, i just took a look at the right side of the rifle, and there were no pin holes on the colt. There was a hole on the rail clamp for the optic. I test fitted it, and it was the right size.

took the optic off (ugh. that's gonna be annoying next week) and the pin fit perfectly. I guess it's the manufacturer's method of ensuring there isn't any forward/rear sliding on the rails. the pin protrudes into the lateral grooves of the rail. I don't know if it's necessary, since the clamp holds it to the rail pretty well.

And it'll probably just fall out again.


Thank you all for your assistance with this. This really shows i have to learn the intricacies beyond a military field strip. :facepalm:

LOL glad you found where it belongs. I got so focused on the rifle that I forgot about the optic. I wouldn't have been of any help there anyway as I'm not familiar with that specific optic. But yes, something in the location you describe acts as a recoil stop so it'll be a good idea to put it back and secure it. :)

SgtMerc
05-28-2012, 7:16 PM
How about if you slide it into your rail clamp then press it fwd while tightening. Won't that capture the pin?

i suppose it might. only time will tell. but it's open on one side, not peened or staked. i was thinking a little red loctite while it's off the rail, then reattach when dry.

Peter.Steele
05-28-2012, 7:32 PM
Ok, i just took a look at the right side of the rifle, and there were no pin holes on the colt. There was a hole on the rail clamp for the optic. I test fitted it, and it was the right size.

took the optic off (ugh. that's gonna be annoying next week) and the pin fit perfectly. I guess it's the manufacturer's method of ensuring there isn't any forward/rear sliding on the rails. the pin protrudes into the lateral grooves of the rail. I don't know if it's necessary, since the clamp holds it to the rail pretty well.

And it'll probably just fall out again.


Thank you all for your assistance with this.


I was actually going to make a joke about spending the money to buy a Colt rifle, then putting a UTG / Leapers / whatever scope on it, and wondering if the parts you were shedding were coming from the rifle, but it sounds like real life beat me to it.



This really shows i have to learn the intricacies beyond a military field strip. :facepalm:


How did you get to be a Sergeant of Marines without detail-stripping a rifle?

Dave07997S
05-28-2012, 8:55 PM
I was actually going to make a joke about spending the money to buy a Colt rifle, then putting a UTG / Leapers / whatever scope on it, and wondering if the parts you were shedding were coming from the rifle, but it sounds like real life beat me to it.






How did you get to be a Sergeant of Marines without detail-stripping a rifle?

I can tell you in the Army we were told to never disassemble the FCG. Although we did it all the time...only way to really clean the weapon and pass inspection.

Dave

tuna quesadilla
05-28-2012, 11:55 PM
im not an ar guy but arent there pins like that behind the castle nut plate thing. Is there a pin that holds the selector in?

There is a detent that holds in the rear takedown pin but it looks nothing like that and there's no way it could fall out without the castle nut magically unstaking itself and backing off.

peter95
05-29-2012, 7:39 AM
honestly, check out your LPK, if you see all the holes filled and nothing loose, maybe it was just a spare that fell into your hands.

It shot fine, you stripped it and still shot fine, you are fine.

SgtMerc
05-29-2012, 7:42 AM
How did you get to be a Sergeant of Marines without detail-stripping a rifle?

Unless you're an armorer on in an infantry unit, you only get taught field strip. And even then, i realize now that we were slightly misinformed. Granted, our rifles were hand-me-downs, and breakfree CLP is more abundant than froglube etc.

h0use
05-29-2012, 8:43 AM
time to get some kns non rotating pins

21SF
05-29-2012, 9:18 AM
Colt only make fight'n guns not safe queens. Get over it, oh wait wrong thread. :rolleyes:

Ruiner
05-29-2012, 6:15 PM
time to get some kns non rotating pins

You missed the part where he found out it was from his optic and not his rifle...

kenbo776
05-29-2012, 7:11 PM
Similar thing happened to me several months ago. Turned out it was the scope cover hinge pin.

NSR500
05-29-2012, 7:41 PM
Right when I saw the picture I knew it had to have come from the optic. Dump that Chicom optic.

TreeHugger
05-29-2012, 9:03 PM
Easy solution, tactical duct tape (http://www.vtarmynavy.com/tactical_duct_tape.htm) :)

loosewreck
05-29-2012, 10:26 PM
Right when I saw the picture I knew it had to have come from the optic. Dump that Chicom optic.

Right. I wish I'd clicked on this thread earlier, after seeing the pictures the optic was my first guess.

Dreaded Claymore
05-30-2012, 12:14 PM
I can tell you in the Army we were told to never disassemble the FCG. Although we did it all the time...only way to really clean the weapon and pass inspection.

Dave

What were they looking for when they inspected? If there was oil on the rifle, would they fail you? Or did you have to have a bunch of dust bunnies in the fire control group?