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Posted: 10/6/2008 12:07:26 PM EDT
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I finally decided on what upper to go with on my build. I couldn't find exactly what I wanted so I had to settle for the closest thing. It is the stag varmit, stainless steel 24" barrel. I want an all black barrel to match the gun but I couldn't find one as part of an upper and since this is my first build I didn't want to jump in too deep by building the lower AND upper. So my options of getting a 1 in 8 twist with a sturdy barrel for accuracy were limited to the stainless finish. Lucky for me I am already set up with an airbrush and an assortment of duracoat (and if I am worried about temps with rapid fire duraheat is a web order away). So I will be able to easily turn my barrel black. This brings up my question. Is the gas block such a tight fit (after removing the pins) that it needs to be pressed off? Or is there enough wiggle room that I can put a thin layer of duracoat between it and the barrel. Oh and for those wondering I plan on leaving the crown un-coated so that the air pressure ballistics are not affecting the accuracy due to a slight thickness variation in the coating. Thanks for the help |
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Hmmmm...that last part about air pressure variations causing an issue...wow, haven't heard that one. As far as the gas block, it depends. I had a YHM gas block that required the strength of a Mack truck to remove after I had removed the set screws holding the thing to the barrel. It was absolutely unbelievable. The tolerances were such that I don't think it needed the set screws to hold the bastard on, and I ended up freezing the barrel overnight to get it off. To this day, it was the biggest pain in the ass I can ever recall in building these things. So, depending on who builds your gas block and how it interfaces with this particular barrel will determine how easy or hard it will be to put on or take off. It could be that a couple thousandths of Duracoat might be all that is needed to make it too difficult to put on the block. Personally, I would put the block on without any coating & see how tight it is, then go from there. If it just about makes it with a bare barrel, you'll end up gouging off the Duracoat if you attempt to install it with such a tight fit before coating. BTW, explain that pressure variation thing for me, just so I know  |
I don't know for sure but it sounds like he is saying that the thickness of the Duracoat might affect the accuracy i.e. if the coating is thicker on one side than the other then it might be like an uneven crown or a nick in the crown and cause instability in the bullet as it leaves the muzzle. I'm not a good enough shot to tell even if it's true. |
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