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Posted: 5/7/2012 4:34:26 PM EDT
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Ugghhhh.....
So about 3/4 of the way through cleaning my rifle for the first time, I noticed when assembling the BCG that the bolt cam pin was broken in half! Wtf. Did I do something wrong? I don't recall using that much force to push the pin out. Anyone have any clue on what caused this? 
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How many rounds through it?
Either it broke with normal wear or there was a defect in the metal that caused it to prematurely break. It happens, no big deal... It is not really anything the manufacturer would have been able to see or detect in QC. Contact the manufacturer for a new one. Should have a spare around for cases like this anyways. I would check out the upper for unusual wear marks though, could be caused by an out of spec part rubbing against it and causing unusual forces. Although the top of it (where the rubbing would be) looks fine. My vote is just a flaw in the metal. |
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How many rounds through it? Either it broke with normal wear or there was a defect in the metal that caused it to prematurely break. It happens, no big deal... It is not really anything the manufacturer would have been able to see or detect in QC. Contact the manufacturer for a new one. Should have a spare around for cases like this anyways. I would check out the upper for unusual wear marks though, could be caused by an out of spec part rubbing against it and causing unusual forces. 400 rounds. Give them a call tomorrow.... And if the new one fails as well? |
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How many rounds through it? Either it broke with normal wear or there was a defect in the metal that caused it to prematurely break. It happens, no big deal... It is not really anything the manufacturer would have been able to see or detect in QC. Contact the manufacturer for a new one. Should have a spare around for cases like this anyways. I would check out the upper for unusual wear marks though, could be caused by an out of spec part rubbing against it and causing unusual forces. 400 rounds. Give them a call tomorrow.... And if the new one fails as well? If the new one fails as well you would be looking at one of 3 things 1. Bad batch of Cams at the manufacturer. 2. Manufacturer is using crap metal, I assume this is a known company and known for quality parts so this is doubtful? 3. Something is wrong in your rifle, not sure exactly what set of circumstances would lead to this malfunction... Doubtful again. I still vote for this being just a random manufacturers defect that is the fault of no one, just one of those things that happens once and awhile. Curiousity sake - is this a DI upper or piston? |
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. The only thing that looks a bit off inside the upper, are the 2 corners of the indention to the side of the gas tube seen in these photos. Is that normal ware or damage caused by the broken cam pin? 
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Thats not normal, but I dont think it will cause an issue. I'd make sure that you send these pics when you call, before you put in the new cam... the upper wear is perfectly normal......while the upper may be bone dry that wear will only get worse with use. DD MK18 upper with around 1,500 rounds through it, and only one stoppage from a torn wolf case rim, every rifle i have ever owned has had wear marks on that area 
the Cam Pin was probably not made properly |
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Thats not normal, but I dont think it will cause an issue I'd make sure that you send these pics when you call, before you put in the new cam... Yeah, that's my thought. The breakage allowed it to rise up a bit and make contact with the receiver. Probably just a fluke. Go with another one and it shouldn't do it again. |
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Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. i was wondering if he even shot it? cause that thing is like off the shelf brand new clean, i can never get my rifle that clean no matter how hard i try |
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Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. Lol It's a brand new rifle. I have OCD when it comes to cleaning my fire arms. The upper was cleaned with solvent prior to the pics taken and yes I applied lubricant prior to shooting. |
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Quoted: Quoted: Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. Lol It's a brand new rifle. I have OCD when it comes to cleaning my fire arms. The upper was cleaned with solvent prior to the pics taken and yes I applied lubricant prior to shooting. You need to re-oil it after cleaning. One of the reasons parkerized and anodized surfaces as so good is because they hold the oil, preventing corrosion. |
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Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. I happen to have a few can of brake cleaner.... wonder how well it would work to clean out the upper. Or if would mess up the coatings |
tell us how stag is when you call and ect
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Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. I happen to have a few can of brake cleaner.... wonder how well it would work to clean out the upper. Or if would mess up the coatings Don't use brake cleaner. It will wash off dry film lube. I made this mistake once. Never again. |
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Unless you cleaned that rifle with brake cleaner before you took those photos, you seriously need to lube that thing up. i was wondering if he even shot it? cause that thing is like off the shelf brand new clean, i can never get my rifle that clean no matter how hard i try he said 400 rounds. I've seen a few cam pins break/fail the same way, at the firing pin hole. Much higher round counts though! |
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. Remove the firing pin? I thought I just had to twist the cam pin with pliers to get it out. WTF? 
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. Remove the firing pin? I thought I just had to twist the cam pin with pliers to get it out. WTF? Dude, you just made me have to go back to see who the OP was. The potential epicness if that....... |
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. Remove the firing pin? I thought I just had to twist the cam pin with pliers to get it out. WTF? Dude, you just made me have to go back to see who the OP was. The potential epicness if that....... Lmao.. Thumbs buddy, thumbs.. |
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. Remove the firing pin? I thought I just had to twist the cam pin with pliers to get it out. WTF? Dude, you just made me have to go back to see who the OP was. The potential epicness if that....... Lmao.. Thumbs buddy, thumbs.. I got it, I got it... But that cam is weird. Have you made any calls about it yet? |
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Check the inside of your upper receiver. Is there any gouging inside from the cam pin? The cam pin should basically fall out when you remove the firing pin. Should require almost no force to get it out. That isn't normal. Remove the firing pin? I thought I just had to twist the cam pin with pliers to get it out. WTF? Dude, you just made me have to go back to see who the OP was. The potential epicness if that....... Lmao.. Thumbs buddy, thumbs.. I got it, I got it... But that cam is weird. Have you made any calls about it yet? Yea called 30 mins ago, no answer. The voice mail picked up didn't leave a message. Sent them an email though. Soon as I hear back I'll lets y'all know :) |
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Upper wear is totally normal. I'm confused by the people saying it isn't... None of mine have the 'grainy' parts for and aft the cutout, however the inside on a few of them is devoid of nearly all finish on the sliding contacts and still dont have the 'grain'. I dunno what to say... |
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Upper wear is totally normal. I'm confused by the people saying it isn't... You are right.. Just got a reply from stag.. (damn that was fast) they first noted that the picture of the "gouge" in the upper is totally normal. Weather the cam pin is broken or solid it's still going to hit that notch in the chamber. Also they said they have no idea what caused the pin to break in half, and that its not common. They offered to send me 2 extra pins free of charge. Reason for failure = defective metal. Got to say rather pleased on their speedy response and eagerness to replace broken part. +1 |
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Upper wear is totally normal. I'm confused by the people saying it isn't... You are right.. Just got a reply from stag.. (damn that was fast) they first noted that the picture of the "gouge" in the upper is totally normal. Weather the cam pin is broken or solid it's still going to hit that notch in the chamber. Also they said they have no idea what caused the pin to break in half, and that its not common. They offered to send me 2 extra pins free of charge. Reason for failure = defective metal. Got to say rather pleased on their speedy response and eagerness to replace broken part. +1 Nice! Good on stag. (I.ve got to look at my guns; I'll post the  on the 'grit' now and be done with it...)
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Upper wear is totally normal. I'm confused by the people saying it isn't... You are right.. Just got a reply from stag.. (damn that was fast) they first noted that the picture of the "gouge" in the upper is totally normal. Weather the cam pin is broken or solid it's still going to hit that notch in the chamber. Also they said they have no idea what caused the pin to break in half, and that its not common. They offered to send me 2 extra pins free of charge. Reason for failure = defective metal. Got to say rather pleased on their speedy response and eagerness to replace broken part. +1 Nice! Good on stag. (I.ve got to look at my guns; I'll post the on the 'grit' now and be done with it...)check out my pic on the last page....its normal |
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