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Thread: How important is a pinned-on gas block?

  1. #21
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    A NO BRAINER!

    A lot of things happen when the gas block moves even slightly. The alignment with the gas key on the bolt causing it to wear out at an angle,the pressure loss at not striking straight on. Also the off angle that is put on the bolt carrier that will cause early and uneven wear on the inside of your upper receiver. I would never go with a set screw type, IMO it's a cop out and an easy out for a half assed way to do a job.
    "you wanna know what i think....it don't really matter what i think. once that first bullet goes past your head, politics and all that shit go right out the window!"SFC Hoot Hooten.

    ( what are you gonna do )" I'm gonna get better and burn their play house down".
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  2. #22
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    ok please dont flame me

    pins are a cheap way maybe them too can fail with heat and cooling of the so many different medias working together - if you use cross bolt with a TRUE shank to part size of the barrel slots and part of the ''block '' mating tightly with blue loctite so can work on the weapon if needed .

  3. #23
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    Okay, what if the gas block is a Low Profile type, and it is fully enclosed in the handguard....is pinning still necessary?
    "The secret to happiness is freedom, and the secret to freedom is courage." - Thucydides, c. 410 BC

  4. #24
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    Quote Originally Posted by wild_wild_wes View Post
    Okay, what if the gas block is a Low Profile type, and it is fully enclosed in the handguard....is pinning still necessary?
    The rail over the gas block will prevent things from hitting the gas block possibly knocking it lose, however the rail over the gas block will not prevent the gas block from heating during firing along with the barrel. This heating cooling cycle is 1/2 of what can cause the gas block to come lose. The pin will stay in place during a heating cycle. A thread locking compound will and does break down with heat.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  5. #25
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    Quote Originally Posted by wild_wild_wes View Post
    Anyone use the GG&G front flip up/gas block? It is pinned on:
    I use the bolt on version of that. It has a full-length clamping sleeve, and is cross-bolt with three bolts torqued to 35 in-lb each (per GG&G ) with Loctite. I haven't had any trouble with it, but if I did I'd have a qualified person add a pin or two.

    I would avoid set screw gas blocks at all costs, though.

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