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Thread: Aluminum Gas block durability
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18-08-2018, 20:07 #1
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Aluminum Gas block durability
Good evening
I was wondering if any members here have experience with aluminum gas blocks on AR rifles?
I have been reading that the expansion of the aluminum gas block relative to the steel barrel (and the different rates that they expand and contract) can cause a failure, sometimes serious ones.
I have a Sig M400 which has a large aluminum gas block up front.
I am thinking about putting a low profile steel gas block in place to avoid this.
The other obvious benefit of this is that I am able to put a full length hand guard on my AR (due to lower profile gas block not blocking the hand guard) but that’s a side issue to the original issue at hand.
Any input?
Thanks!
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18-08-2018, 20:10 #2
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Re: Aluminum Gas block durability
Take it off asap and install a steel one.
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18-08-2018, 20:12 #3
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Re: Aluminum Gas block durability
Do you know any competent gun smiths who can do this?
I am from KZN but i am more than willing to drove to Joburg or Pretoria if need be to get the job done.
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18-08-2018, 20:24 #4
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Re: Aluminum Gas block durability
Try Stuart at Ihawu, it's not a big job. You can even do it yourself, there are vids on Youtube.
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18-08-2018, 20:36 #5
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Re: Aluminum Gas block durability
Ok thanks.
I know Ihawu well.
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18-08-2018, 20:36 #6
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Re: Aluminum Gas block durability
I am nervous to tinker on my own.
I am very OCD with my guns.. as many on this forum will know!
I would be picky about the gunsmith I let near my rifle too.
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18-08-2018, 20:44 #7
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Re: Aluminum Gas block durability
Any other well respected gun smith suggestions?
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18-08-2018, 21:38 #8
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Re: Aluminum Gas block durability
Maybe ask Alan Henry at Natal Gun Company in Amanzimtoti?
He usually works on bolt action rifles
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18-08-2018, 22:30 #9
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Re: Aluminum Gas block durability
So when I took my DM4 to MRST they informed me it had an aluminum gas block. It was shit and leaking gas. I was close to having a bolt action. Get rid of it.
MRST know their ARs I recommend them.
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19-08-2018, 11:37 #10
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