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Old 05-15-2013, 10:29 PM   #31
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Just found out it is 4140 steel how bad is that cause I've never heaard of that being used in a bcg
I haven't heard of 4140 steel in a bolt or carrier. I especially wouldn't want it for the bolt! DPMS should be called out about this if it's true.
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Old 05-15-2013, 10:33 PM   #32
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Are you sure DPMS said the bolt is 4140? I bet they meant the barrel.

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Old 05-15-2013, 11:39 PM   #33
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Or perhaps the carrier is 4140 and the bolt could be something else?

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Old 05-16-2013, 12:44 AM   #34
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Well DPMS never has been good at listing specs. On the other hand look at how BCM describes their BCG!

•Milspec Carpenter No. 158® steel bolt
•HPT Bolt (High Pressure Tested/ Proof)
•MPI Bolt (Magnetic Particle Inspected)
•Shot Peened Bolt
•Chrome Lined Carrier (AUTO)
•Chrome Lined Gas Key
•Gas Key Hardened to USGI Specifications
•Grade 8 Hardened Fasteners
•Key Staked Per Mil-Spec
•Tool Steel Extractor
•BCM Extractor Spring
•Black Extractor Insert
•Mil-Spec Crane O-Ring
http://www.bravocompanyusa.com/BCM-Bolt-Carrier-Group-MPI-Auto-M16-p/bcm%20bolt%20carrier%20group%20auto%20mp.htm

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Old 05-16-2013, 01:08 AM   #35
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Are you sure DPMS said the bolt is 4140? I bet they meant the barrel.
They emailed me that the BCG is 4140 kinda beside myself maybe the ment the carrier but that doesn't make sense either
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Old 05-16-2013, 01:17 AM   #36
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This is the email i got from them so u tell me?????? sorry for the zoom lvl but u can read it



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