Posted: 4/20/2013 1:28:58 PM EDT
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I ordered one of the 3/28 MPI BCG's. I received it and the staking on it is like nothing I've ever seen before. I can't post pictures but it had been staked so hard that there was jagged metal pieces sticking up on either side of the stake. I went to touch it and actually stabbed myself on it and broke the piece of metal off in my finger. No big deal, I got it out but I am wondering if this incredibly forceful over staking can cause micro cracks in the carrier or carrier key. I know many others that received the BCG's from this batch had the same problem so maybe they can post a pic. I've seen some serious staking but this is nuts.
Any info on this? Thanks PSA. Keep up the good work. |
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I have a staking jig and it doesn't take much force to split the gas key. Quoted: Oh I've shot it. I'm just concerned that the BCG will have an issue crop up earlier than it should due to the great amount of force that was used in staking. It shoots fine now. After I got a new cam pin since the BCG was missing one. |
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Well i was planning on shooting the snot out of it and seeing what happened. Then... I installed it in its final intended upper just a bit ago after slobbing everything with Slip EWL. I had to slam the butt down while yanking the charging handle the first 20 times before it loosened up. Then I said f it and dumped 2 pmags as quick as I could. Each time #10 failed to go into battery. I plan on shooting a couple hundred rounds tomorrow to see if it loosens further, inspecting for damage along the way. We'll see what happens I guess but it does seems to be getting much better.
Edit: I know none of that has anything to dour with the staking. Just continues experience. It is definitely staked far far beyond what is necessary but we'll se what happens. I think the bolt issue was a very tight bolt to carrier fit. |
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i had these bookmarked/ or susbcribed see if they help.
http://www.ar15.com/forums/t_3_12/610065_BCG_Identification.html http://www.ar15.com/forums/t_3_118/610107_Received_the_PSA_BCG_Pictures_included.html |
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Yeah that PSA BCG thread was the one I referenced. I am ignorant as to the effects of different forces
Of staking but this one is stakes about 5x as forcefully as any others I own including Colt, RCA, PWS, and BCM. Just seemed like a lot of pressure put in the whole carrier. |
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Quoted:
I just got one of the M16 MPI BCGs and it has a MIM gas key and staking similar (though not quite as "aggressive") to the one in the the thread posted. I intend to drop it into my build and shoot it. Per PSA the gas keys are not MIM: "There is so much inaccurate speculation by ill-informed internet "authorities," it is hard to know where to start. The BCG's in question are not PSA branded products. While our branded BCG's have been out of stock, we have been working diligently to keep the AR market supplied with reasonably priced, quality alternatives. We do not have any carriers supplied to us with MIM keys. To our knowledge we do not know anyone producing a MIM gas key. The keys used for this Carrier are 4140 steel Austentized @1575F, Oil Quenched and Vacuum tempered to Rc 26-32 per Mil-W-13855 section 3.5.5 and QAP12993884. The key screws are grade 8 from a ISO 9001 certified company, and meet the specs needed for reliable and safe operation. However, we prefer 100% domestic content, not just 90%, so we have contacted the supplier and future shipments will have domestic screws. The staking is done with a hydraulic press, the carrier in a custom-made fixture. The staking is heavy, but we have inspected our remaining stock and the key or carrier has not been compromised. We have been using these carriers to test fire uppers for the last several months, and have conducted a few endurance tests. We have had zero issues. To suggest to "know" otherwise based on observation is either an exercise in ignorance, or outright slander. As we have provided this information, future speculation will be treated as slander and referred to appropriate channels. OP, if you have any issue with this BCG outside of normal wear and tear, please contact us directly, we will be happy to take care of you." |
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Quoted:
Quoted:
I just got one of the M16 MPI BCGs and it has a MIM gas key and staking similar (though not quite as "aggressive") to the one in the the thread posted. I intend to drop it into my build and shoot it. Per PSA the gas keys are not MIM: "There is so much inaccurate speculation by ill-informed internet "authorities," it is hard to know where to start. The BCG's in question are not PSA branded products. While our branded BCG's have been out of stock, we have been working diligently to keep the AR market supplied with reasonably priced, quality alternatives. We do not have any carriers supplied to us with MIM keys. To our knowledge we do not know anyone producing a MIM gas key. The keys used for this Carrier are 4140 steel Austentized @1575F, Oil Quenched and Vacuum tempered to Rc 26-32 per Mil-W-13855 section 3.5.5 and QAP12993884. The key screws are grade 8 from a ISO 9001 certified company, and meet the specs needed for reliable and safe operation. However, we prefer 100% domestic content, not just 90%, so we have contacted the supplier and future shipments will have domestic screws. The staking is done with a hydraulic press, the carrier in a custom-made fixture. The staking is heavy, but we have inspected our remaining stock and the key or carrier has not been compromised. We have been using these carriers to test fire uppers for the last several months, and have conducted a few endurance tests. We have had zero issues. To suggest to "know" otherwise based on observation is either an exercise in ignorance, or outright slander. As we have provided this information, future speculation will be treated as slander and referred to appropriate channels. OP, if you have any issue with this BCG outside of normal wear and tear, please contact us directly, we will be happy to take care of you." I saw that post and am going to respectfully disagree. Again, I have no problem with my BCG. |
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Thanks for your reply and concern PSA. I will inspect for undue wear tonight but if there isn't any then I really have no further issue. My initial concern was wether or not this forceful staking could cause micro cracks. It doesn't sound like that's the case. I've already installed a spare cam pin so no worries there. I will update with pics and order info tomorrow. Thanks! |
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Quoted:
Quoted:
Quoted:
I just got one of the M16 MPI BCGs and it has a MIM gas key and staking similar (though not quite as "aggressive") to the one in the the thread posted. I intend to drop it into my build and shoot it. Per PSA the gas keys are not MIM: "There is so much inaccurate speculation by ill-informed internet "authorities," it is hard to know where to start. The BCG's in question are not PSA branded products. While our branded BCG's have been out of stock, we have been working diligently to keep the AR market supplied with reasonably priced, quality alternatives. We do not have any carriers supplied to us with MIM keys. To our knowledge we do not know anyone producing a MIM gas key. The keys used for this Carrier are 4140 steel Austentized @1575F, Oil Quenched and Vacuum tempered to Rc 26-32 per Mil-W-13855 section 3.5.5 and QAP12993884. The key screws are grade 8 from a ISO 9001 certified company, and meet the specs needed for reliable and safe operation. However, we prefer 100% domestic content, not just 90%, so we have contacted the supplier and future shipments will have domestic screws. The staking is done with a hydraulic press, the carrier in a custom-made fixture. The staking is heavy, but we have inspected our remaining stock and the key or carrier has not been compromised. We have been using these carriers to test fire uppers for the last several months, and have conducted a few endurance tests. We have had zero issues. To suggest to "know" otherwise based on observation is either an exercise in ignorance, or outright slander. As we have provided this information, future speculation will be treated as slander and referred to appropriate channels. OP, if you have any issue with this BCG outside of normal wear and tear, please contact us directly, we will be happy to take care of you." I saw that post and am going to respectfully disagree. Again, I have no problem with my BCG. Can PSA view the images in this thread of these two Bolt Carrier Keys and comment on the differences in regard to material???? IMHO the key with the "6" in the circle has some features that scream MIM..... Can y'all put this to bed? |
