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[ARCHIVED THREAD] - B Co Bolt (Page 1 of 2)
Posted: 5/24/2011 3:50:52 PM EDT
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I just had a Bravo Co bolt chip at the top of the cam pin hole. The rifle has less than 1k rounds through it. Where can I find a new bolt - B Co is out.
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No. I haven't contacted B Co. I wouldn't expect a warranty. I don't know how to post a pic, but I can e-mail one to someone and he can post it. Any takers? Regardless if they warranty it or not, they may just want to take a look at the bolt for possibly defects. Who knows really but BCM definately stands behind their products so I'm sure they would be interested in this. |
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Pics of the Bolt unit. http://i879.photobucket.com/albums/ab356/Figuelon/1b09ce92.jpg http://i879.photobucket.com/albums/ab356/Figuelon/407670cd.jpg J I would definately contact BravoCo and at least let them see what happened and see what they have to say about it. |
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MP on one side - AA on the other. Yeap....that be LMT. MP=Magnetic Particle Inspection AA= is the Lot number code. Key feature to identifying the LMT bolt otherwise is the ring behind the lugs....LMT's patented relieved lug design. Is the cam pin loose fit in the bolt? Contact Gene Swanson at LMT.Email him a better picture with description of the defect. http://www.lewismachine.net/ |
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Key feature to identifying the LMT bolt otherwise is the ring behind the lugs....LMT's patented relieved lug design. This ring? http://www.bravocompanyusa.com/v/vspfiles/photos/BCM%20Bolt%20Assemly%20MP-3.jpg no this ring http://www.ar15.com/mobile/topic.html?b=3&f=118&t=532422 look at the small indent right behind the lugs and before the ring |
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Looks the same to me? Maybe I'm just looking at shadows.  The circled area is the ring... or maybe groove would be a better term. http://i743.photobucket.com/albums/xx74/Unicorn161/LMTboltcircled.jpg Yeap I should have said groove apparently.  Thanks Unicorn.
Its the groove that runs around the circumference of the bolt body at the root/base of the bolt lugs.. |
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That bolt was in a B Co 16" M4 Upper I puchased from B Co. It probably has a complete LMT BCG in it (obviously an LMT bolt).
I have other uppers with B Co BCG's. I got everything out last night and verified exactly what I have. I'm going to contact LMT. If they'll replace it, great. If not, I'll buy another LMT bolt. Thanks for all of the info an pics. |
| Check these out.http://www.ar15performance.com/inc/sdetail/3255/336 |
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Sale Price: $105.00 You can get LMT bolts for $60ish, but I would wait until LMT gets back with you... |
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Why would you trust those? They aren't even made to be mil-spec. They claim to be stronger, but where's the factual evidence? Were just supposed to take their word for it i guess huh? |
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Where did you buy the bolt from? Posted Via AR15.Com Mobile Aparently, he got it from BCM. huh? so he thought he had a BCM this whole time? Thats what i took from it. Just wanted to make sure this wasn't a "I bought this BCM bolt from a guy down by the river" deal. OP has said he bought it directly from bravo, so that also should eliminate someone swapping BCG's along the way. |
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Let me just make sure I'm following here... 1. You purchased the upper receiver directly from Bravo Company. 2. You added a BCM Bolt Carrier Group to your order. 3. You received the upper with a LMT BCG. Is this correct? Did you possibly accidentally order the LMT BCG instead of the BCM BCG? Can you check your order? Not trying to call anyone a liar here but I would be very surprised if BCM shipped out an LMT BCG in one of their guns instead of their own. |
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Why would you trust those? They aren't even made to be mil-spec. They claim to be stronger, but where's the factual evidence? Were just supposed to take their word for it i guess huh? I've talked to MANY people who own them,most have 7.62x39's and 6.8's.They ALL have had great luck and praise the owner and what he sells.His products are well known and have a good rep. in the 6.8 forums.It's called "research" that's why i'd trust them  .
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Why would you trust those? They aren't even made to be mil-spec. They claim to be stronger, but where's the factual evidence? Were just supposed to take their word for it i guess huh? I've talked to MANY people who own them,most have 7.62x39's and 6.8's.They ALL have had great luck and praise the owner and what he sells.His products are well known and have a good rep. in the 6.8 forums.It's called "research" that's why i'd trust them .I'm not doubting this bolt isnt praised by a few people but if you did your research you would know that Carpenter 158 is the Mil spec bolt alloy. Carpenter 158 is > 9310. Also there's no mention of magnetic particle testing or high pressure proof load testing. No mention of shot peening for stress relief or anything mil spec bolts have. Just because some bubba with micrometer and a swiss can crank out a bolt with reinforced radii around the lugs makes it a better product? |
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Why would you trust those? They aren't even made to be mil-spec. They claim to be stronger, but where's the factual evidence? Were just supposed to take their word for it i guess huh? I've talked to MANY people who own them,most have 7.62x39's and 6.8's.They ALL have had great luck and praise the owner and what he sells.His products are well known and have a good rep. in the 6.8 forums.It's called "research" that's why i'd trust them .I'm not doubting this bolt isnt praised by a few people but if you did your research you would know that Carpenter 158 is the Mil spec bolt alloy. Carpenter 158 is > 9310. Also there's no mention of magnetic particle testing or high pressure proof load testing. No mention of shot peening for stress relief or anything mil spec bolts have. Just because some bubba with micrometer and a swiss can crank out a bolt with reinforced radii around the lugs makes it a better product? I was told by the owner they ARE magnetic partilcle tested.He also said this alloy,if heat treated correctly(like his parts)is just as strong or stronger than carpenter 158.I know he can say this that and anything else he wants,that's why i talked to as many people that owned them as i could.If they said the bolt was shit,of even just ok i would not have bought one. |
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That bolt was in a B Co 16" M4 Upper I puchased from B Co. It probably has a complete LMT BCG in it (obviously an LMT bolt). I have other uppers with B Co BCG's. I got everything out last night and verified exactly what I have. I'm going to contact LMT. If they'll replace it, great. If not, I'll buy another LMT bolt. Thanks for all of the info an pics. If you don't have a spare bolt I would buy another one anyway just to have in case of situations like your having now.That way you dont have a rifle down for a couple weeks or more waiting on a replacement part.That way when you receive the new replacement part from the manufacturer you can put it in your spare parts box.If you don't have a headspace gauge,I would order a Brownells Colt Field II headspace gauge and a firing pin protrusion gauge,keep them in your spare parts box as well.Its good to be self reliant,especially with simple repairs. More than likely I'd say LMT will replace the bolt and will want the bolt back so it can be inspected.LMT has always been quick to respond to my complaints in the past. |
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That bolt was in a B Co 16" M4 Upper I puchased from B Co. It probably has a complete LMT BCG in it (obviously an LMT bolt). I have other uppers with B Co BCG's. I got everything out last night and verified exactly what I have. I'm going to contact LMT. If they'll replace it, great. If not, I'll buy another LMT bolt. Thanks for all of the info an pics. If you don't have a spare bolt I would buy another one anyway just to have in case of situations like your having now.That way you dont have a rifle down for a couple weeks or more waiting on a replacement part.That way when you receive the new replacement part from the manufacturer you can put it in your spare parts box.If you don't have a headspace gauge,I would order a Brownells Colt Field II headspace gauge and a firing pin protrusion gauge,keep them in your spare parts box as well.Its good to be self reliant,especially with simple repairs. More than likely I'd say LMT will replace the bolt and will want the bolt back so it can be inspected.LMT has always been quick to respond to my complaints in the past. "Field II" ... 
Is this the headspace gauge that you're referring to ? Brownells 5.56mm (.223) HEADSPACE GAUGE |
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That bolt was in a B Co 16" M4 Upper I puchased from B Co. It probably has a complete LMT BCG in it (obviously an LMT bolt). I have other uppers with B Co BCG's. I got everything out last night and verified exactly what I have. I'm going to contact LMT. If they'll replace it, great. If not, I'll buy another LMT bolt. Thanks for all of the info an pics. If you don't have a spare bolt I would buy another one anyway just to have in case of situations like your having now.That way you dont have a rifle down for a couple weeks or more waiting on a replacement part.That way when you receive the new replacement part from the manufacturer you can put it in your spare parts box.If you don't have a headspace gauge,I would order a Brownells Colt Field II headspace gauge and a firing pin protrusion gauge,keep them in your spare parts box as well.Its good to be self reliant,especially with simple repairs. More than likely I'd say LMT will replace the bolt and will want the bolt back so it can be inspected.LMT has always been quick to respond to my complaints in the past. "Field II" ...
Is this the headspace gauge that you're referring to ? Brownells 5.56mm (.223) HEADSPACE GAUGE Yes. Looks like they stopped using the "Colt Field II" in the description since I purchased mine.Gauge spec is 1.4736". The headspace gauge I use most is a USGI Field which is 1.4730". |
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Why would you trust those? They aren't even made to be mil-spec. They claim to be stronger, but where's the factual evidence? Were just supposed to take their word for it i guess huh? I've talked to MANY people who own them,most have 7.62x39's and 6.8's.They ALL have had great luck and praise the owner and what he sells.His products are well known and have a good rep. in the 6.8 forums.It's called "researchreading online forums" that's why i'd trust them .not research. |
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I was never impressed with LMT, soooo many issues from owners. 
Issues with LMT bolts, specifically ... Are you able to provide some examples ? I've never really heard of any issues with LMT at all. Bill I've heard of a few and expirienced one. I think during the '08 scare QC/QA suffered a bit. Overall I still think LMT is a quality brand, though. |
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I was never impressed with LMT, soooo many issues from owners.
Issues with LMT bolts, specifically ... Are you able to provide some examples ? I've never really heard of any issues with LMT at all. Bill Don't you remember "The sky is falling because LMT uses MIM gas keys!" a few years ago.
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I was never impressed with LMT, soooo many issues from owners.
Issues with LMT bolts, specifically ... Are you able to provide some examples ? I've never really heard of any issues with LMT at all. Bill Don't you remember "The sky is falling because LMT uses MIM gas keys!" a few years ago.
I remember that as well. But that had to do with the carrier, not the bolt. |
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Let me just make sure I'm following here... 1. You purchased the upper receiver directly from Bravo Company. 2. You added a BCM Bolt Carrier Group to your order. 3. You received the upper with a LMT BCG. Is this correct? Did you possibly accidentally order the LMT BCG instead of the BCM BCG? Can you check your order? Not trying to call anyone a liar here but I would be very surprised if BCM shipped out an LMT BCG in one of their guns instead of their own. back in 2005 I told Paul I wanted a Complete LMT M4 upper It came with a CMT Carrier & Bolt Phone order |
[ARCHIVED THREAD] - B Co Bolt (Page 1 of 2)
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