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4 Comments
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JR
5 years ago
If I remember correctly, my 14.5 BCM came from the factory with dimples for the gas block bolts.
George 1
5 years ago
I always use a jig and dimple all set screw holes. With a jig it is easy to do and there is no reason not to in my opinion.
Ned
5 years ago
George 1 – ditto.
Mike
5 years ago
Dimpling with a jig is easy so why not do it? I don’t think relying on the set screws alone is a good idea, in part because you are running assumptions that they are properly hardened. Shit happens and there are occasional bad batches of anything. If the gas block isn’t anticipated to be removed often, I like to stake the set screw with a punch. Dimpling helps with the set screws being sunk in slightly to be better staked in my opinion.
Though, pinning is for sure the best, especially taper pins.
This article is filed under the category(s) AR-15s and was published March 23rd, 2021 by Herschel Smith.
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If I remember correctly, my 14.5 BCM came from the factory with dimples for the gas block bolts.
I always use a jig and dimple all set screw holes. With a jig it is easy to do and there is no reason not to in my opinion.
George 1 – ditto.
Dimpling with a jig is easy so why not do it? I don’t think relying on the set screws alone is a good idea, in part because you are running assumptions that they are properly hardened. Shit happens and there are occasional bad batches of anything. If the gas block isn’t anticipated to be removed often, I like to stake the set screw with a punch. Dimpling helps with the set screws being sunk in slightly to be better staked in my opinion.
Though, pinning is for sure the best, especially taper pins.