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Posted: 10/28/2013 4:47:12 PM EST
I normally see bolts that are MPI have the MP markings on the side of the bolt. I just got a new bolt from Red X Arms, and although they state that all their bolts are MPI, it doesn't have the MP markings. I've heard of the MPI being more of "batch" testing, and I'm not sure if I'm skeptical of that or not. Is this common, and I'm assuming there is no way to confirm this?
Link Posted: 10/28/2013 4:55:54 PM EST
[Last Edit: 10/28/2013 4:56:28 PM EST by Medicfrost]
No, some are not. I bought one from 4 Guys Guns that is MPI/HPT, and it's not marked at all.
Link Posted: 10/28/2013 4:58:15 PM EST
i really don't think mpi means much without the hp testing.

it's a 9310 bolt so it isn't milspec. just shoot the shit out of it.
Link Posted: 10/29/2013 1:37:08 AM EST
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Originally Posted By CecilSharps:

it's a 9310 bolt so it isn't milspec.
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What does that have to do with being MPI/HPT?
Link Posted: 10/29/2013 1:42:22 AM EST
In before the ARFcom know it all metallurgists.
Link Posted: 10/29/2013 2:49:59 AM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By CecilSharps:
i really don't think mpi means much without the hp testing.

it's a 9310 bolt so it isn't milspec. just shoot the shit out of it.
View Quote


do you even know the meaning of what you just posted?

OP marking is up to the manf, some do, some dont, some are req'd to
Link Posted: 10/29/2013 2:51:51 AM EST
no DD does not mark their bolts anymore. i have an older one that is but i guess the newer ones are not.
Link Posted: 10/29/2013 4:02:02 AM EST
Thanks for all the info. Much appreciated.
Link Posted: 10/29/2013 8:37:36 AM EST
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Originally Posted By TaylorWSO:


do you even know the meaning of what you just posted?

OP marking is up to the manf, some do, some dont, some are req'd to
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View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By TaylorWSO:
Originally Posted By CecilSharps:
i really don't think mpi means much without the hp testing.

it's a 9310 bolt so it isn't milspec. just shoot the shit out of it.


do you even know the meaning of what you just posted?

OP marking is up to the manf, some do, some dont, some are req'd to


look at the redx site they claim the bolt is tested to milspec. It isn't.
On the mpi/hp testing i don't think mpi is worth much without the high pressure test. It's like getting your colon scanned without drinking the barium.
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