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Posted: 3/2/2012 8:58:46 PM EDT
So I purchased a BCM BCG and when I disassembled it I noticed that the bolt has so much friction that it makes it difficult to move properly. When I took it out I noticed that the extractor is sticking out, causing it to rub inside the bolt carrier and also makes it difficult to insert and extract it from the carrier. Compared to other bolts I have dealt with, I can conclude that this is not normal. Is there something wrong with it? Any help is always appreciated, thanks.
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| So i just took a look and there is no o-ring. I know what you are talking about, some of them have it and some don't. It just looks like the spring is too long that it pushes out the extractor. i don't want to use this BCG until I feel comfortable using it. All the bolts I've dealt with have handled the same way with the bolt carriers, this one definitely different. |
| If it's just the spring do you think if you shot it a few times would it "settle down"? Maybe cut one coil off? Just thinking. Your the one that has to be comfortable with it. I would probably shoot it at least a couple times then recheck it if it were mine though. |
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So i just took a look and there is no o-ring. I know what you are talking about, some of them have it and some don't. It just looks like the spring is too long that it pushes out the extractor. i don't want to use this BCG until I feel comfortable using it. All the bolts I've dealt with have handled the same way with the bolt carriers, this one definitely different. how many coils is your spring? 5 should be the max |
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This might sound like a stupid question but is the spring pushed all the way in? Pull it out and push it back in. You should here a "click" when it's in all the way.
Edit: I am assuming you have taken these apart before. I mean the tiny spring on the extractor. Pull the pin, remove the extractor, and check out the spring. I'm bettin it's not pushed in for some reason. |
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You say it's causing problems, but haven't shot it yet?
I fail to see what problem it's causing? Shoot it. If it doesn't work (100 to 1 it works perfectly), call BCM, they will take care of you. I've had some that have been like that and I think it's the spring tension being higher, not sure, but I do know they have all worked. Good luck. |
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So I purchased a BCM BCG and when I disassembled it I noticed that the bolt has so much friction that it makes it difficult to move properly. When I took it out I noticed that the extractor is sticking out, causing it to rub inside the bolt carrier and also makes it difficult to insert and extract it from the carrier. Compared to other bolts I have dealt with, I can conclude that this is not normal. Is there something wrong with it? Any help is always appreciated, thanks. http://i296.photobucket.com/albums/mm175/deluxesupreme/005-5.jpg http://i296.photobucket.com/albums/mm175/deluxesupreme/006-5.jpg You don't say whether or nor there is a function issue. Have you tried this bolt ? |
| I haven't shot my rifle yet, so I cannot determine if there is a problem. It does take a lot of force to move the Bolt in the BCG. About the spring comment, it is seated all the way back. i really do believe it is out of spec, it does not sit flush with the Bolt. I never experienced this with my 3 other bolts. |
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I haven't shot my rifle yet, so I cannot determine if there is a problem. It does take a lot of force to move the Bolt in the BCG. About the spring comment, it is seated all the way back. i really do believe it is out of spec, it does not sit flush with the Bolt. I never experienced this with my 3 other bolts. Your thread's title is misleading. Permission granted to contact BCM. 
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Granted, the extractor looks a little high (by the pic). BCM uses a stiff extractor spring, means it rarely needs the donut when new.
2 questions I gotta ask. Did you lube the bolt and carrier? And, you are aware that new gas rings will seat (and loosen somewhat) with use? Both of those will make a new bolt pretty stiff in a new carrier. The gas rings will seat in the new chrome lining inside of a carrier. I've had a few stiff bolts when new. Not meaning to sound smartass, just a couple things to check since all my BCM BCGs have been tight when new. Edit to add-> I just pulled and looked at 9 spare bolts, 3 of those had high extractors similar to yours, one almost and the rest flush These are mostly Colt and FN, with a couple that are AA or RR. The high extarctor (if not binding) should not cause a problem. |
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I haven't shot my rifle yet, so I cannot determine if there is a problem. It does take a lot of force to move the Bolt in the BCG. About the spring comment, it is seated all the way back. i really do believe it is out of spec, it does not sit flush with the Bolt. I never experienced this with my 3 other bolts. Have you tried putting your other bolts in that carrier? This may rule out it being the carrier. Take another extractor and try it on the bolt. This should tell you if it's the extractor or the bolt that's the problem. If you have to force things together I would not shoot it either. You run the risk of it messing something else up. Edit: By saying "force things together" I mean just that. There is a difference in just a new unworn part that doesn't move smoothly and one that takes a large amount of strength and strain to fit into place. |
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Call BCM and get a live person to listen your complaint about a new product.  +2. Not bashing BCM, I am sure (from reading here and other sites) that they put out quality stuff, but whenever I tried to contact them I was never able to speak to anyone. Also, consider having at least two complete BCGs, one used exclusively for range and practice and one exclusively for your rifle (tested but not used frequently). I always have three complete BCGs - one for range and practice and the other two (tested but not used frequently) on two rifles, everytime I practice I bring the extra BCG in case the range/practice one fails at which point I will rotate and get another one. FWIW all my BCGs are DD and I am 110% happy with them. |
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Replace the extractor with one that's known to be in spec. If it still sits up too high, return the bolt. Got one like that a few years ago. Rear of extractor sitting up too high. http://i838.photobucket.com/albums/zz305/tz1998/bad2.jpg After a few hundred rounds http://i838.photobucket.com/albums/zz305/tz1998/bad1.jpg New extractor installed. http://i838.photobucket.com/albums/zz305/tz1998/good1.jpg You have given one of the best advices supported with pics. OP's extractor may protrude above the stepped up embossment. OP has stated: When I took it out I noticed that the extractor is sticking out, causing it to rub inside the bolt carrier and also makes it difficult to insert and extract it from the carrier.
What amazes me is the advice he's getting even now just to shoot it. OP does not have to shoot anything if he has determined that extractor is rubbing inside of bolt carrier. DeluxeSupreme, send the bolt back for replacement. Maybe bigbore will buy it from you, since he is certain there's nothing wrong with it. |
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Replace the extractor with one that's known to be in spec. If it still sits up too high, return the bolt. Got one like that a few years ago. Rear of extractor sitting up too high. http://i838.photobucket.com/albums/zz305/tz1998/bad2.jpg After a few hundred rounds http://i838.photobucket.com/albums/zz305/tz1998/bad1.jpg New extractor installed. http://i838.photobucket.com/albums/zz305/tz1998/good1.jpg You have given one of the best advices supported with pics. OP's extractor may protrude above the stepped up embossment. OP has stated: When I took it out I noticed that the extractor is sticking out, causing it to rub inside the bolt carrier and also makes it difficult to insert and extract it from the carrier.
What amazes me is the advice he's getting even now just to shoot it. OP does not have to shoot anything if he has determined that extractor is rubbing inside of bolt carrier. Worst case scenario is that it would act like a single shot. Although I think that the rifle will function just fine. Just make sure it's lubed up. I told the OP to contact BCM only because he seems worried about the part. Just wanted to reinforce his concern. Safe to say that most with experience with the platform would just shoot it. |
| I just checked all three of my bolts (Colt, Daniel Defense, Bushmaster). All of the extractors sit flush with the bolt. If it's actually dragging inside the bolt carrier, I'd say that's a problem. Get a hold of BCM and have them replace the extractor. Based on their reputation, I'm sure it won't be a problem (although you won't get anyone on the phone, you'll need to e-mail them). |
| Thanks everyone for advice. I have contacted BCM and am waiting for a reply. I have lubed up the BCG and still experience the same problem. I have also tried putting them on two of my other Bolt Carriers and same thing happened. The two BCG's I have are Colt and LMT and perform similar to each other in function. Then swapped the extractor on my bolts and same thing. The extractor should not be sticking out or rubbing inside the Bolt Carrier from my experience. I only make trips to the range a few times a year, so it'll be a while before I can even test it out. I don't even want to test it out. Since others have similar bolts like mine, I'm sure I won't run into problems. I just hope that I can break it in to sit flush, although never had to do that with my 2 BCG's. |
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From what you just said I am not sure if the problem followed the extractor or the bolt when you swapped the extractor around.
For me it would not be an issue of being able to fire it or not. I want my parts to fit correctly and having the extractor drag inside the carrier would be unacceptable. YMMV |
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So i just took a look and there is no o-ring. I know what you are talking about, some of them have it and some don't. It just looks like the spring is too long that it pushes out the extractor. i don't want to use this BCG until I feel comfortable using it. All the bolts I've dealt with have handled the same way with the bolt carriers, this one definitely different. No O ring? There should have been one in there. They sell it as a complete unit. I'm NOT doubting you dude, but I would also ask about where the O ring went. Was the Black extractor insert in there? Just curious. |
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BCM states that the o-ring should not be used unless needed. They do not typically install it. On BCM's site when looking at their bolt they have pics with the O ring, and they state it in the features as having the mil-spec O ring. Does the O ring come shipped loose, or does it come installed on the brand new bolt? Reason I'm asking is I have a bcg coming from them, and now I'm curious. Thanks. |
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BCM states that the o-ring should not be used unless needed. They do not typically install it. On BCM's site when looking at their bolt they have pics with the O ring, and they state it in the features as having the mil-spec O ring. Does the O ring come shipped loose, or does it come installed on the brand new bolt? Reason I'm asking is I have a bcg coming from them, and now I'm curious. Thanks. It will NOT be installed. The O ring should be packaged in the plastic in its own separate little compartment. That's how mine have always been packaged. |
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BCM states that the o-ring should not be used unless needed. They do not typically install it. On BCM's site when looking at their bolt they have pics with the O ring, and they state it in the features as having the mil-spec O ring. Does the O ring come shipped loose, or does it come installed on the brand new bolt? Reason I'm asking is I have a bcg coming from them, and now I'm curious. Thanks. It will NOT be installed. The O ring should be packaged in the plastic in its own separate little compartment. That's how mine have always been packaged. Thanks for the clarification dude.
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BCM states that the o-ring should not be used unless needed. They do not typically install it. On BCM's site when looking at their bolt they have pics with the O ring, and they state it in the features as having the mil-spec O ring. Does the O ring come shipped loose, or does it come installed on the brand new bolt? Reason I'm asking is I have a bcg coming from them, and now I'm curious. Thanks. The O-Ring comes in a separate compartment of the bag that holds the BCG. |
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I haven't shot my rifle yet, so I cannot determine if there is a problem. It does take a lot of force to move the Bolt in the BCG. About the spring comment, it is seated all the way back. i really do believe it is out of spec, it does not sit flush with the Bolt. I never experienced this with my 3 other bolts. IF it was mine and it was dragging I would not shoot it either ! My first inclination after ensuring the spring was 5 coils and was seated properly would be to take some needle files to the offending protrusion.... Definitely would NOT chance gouging anything with it though. 
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