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Posted: 9/20/2016 11:04:12 AM EDT
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Thanks to the advise and recommendations of so many of you, I am on the way with my first build. Now more questions.
1. How important would an adjustable gas block be? 2. What are the pros and cons? |
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Very important... if you are running anything but 5.56.
For larger bore tubes you will want a adjustable gasblock in order to make it run reliably and without too much force. Also, this get exacerbated when you attached a suppressor and when you switch between higher pressure and lower pressure loads/bullets. There arent really any cons except that you'll need to turn the screw in and out a few times every few shooting sessions to keep it from seizing up. |
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Read through all the threads around here more.
It seems people are beginning to see that adjustable gas blocks are, for the most part, unnecessary. I was on the phone with a salesman with a well respected company (site sponsor), and when I asked if I needed one of their adjustable gas blocks he laughed and said he can't think of any reason why anyone would need it. They sell .300 blk and 6.8 barrels too. I didn't say the company name because he very well may get in trouble for telling me not to spend my money. Cons - Unnecessary parts open you up to more failures. If you need one, they aren't really a hassle, but if you don't need one, why bother? |
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kinda long-winded, but bear with me
adjustable gas blocks became en vogue with the popularity of three-gun competition competitors are used to using one type of round on a weapon, it makes the gun predictable in performance with that in mind, how do you decrease recoil impulse while maintaining reliability? a solution (not the only solution) was to decrease the amount of recycled gas to just enough to drive the operation of the weapon... and no more and it works, but it's not a reliable method if you use a variety of ammunition types. i.e. varying energy between ammunition types might lead to cycling problems on the other hand, a standard gas block will work just fine with pretty much any ammunition |
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Quoted:
Good info. I'm building a 5.56/.223 so I think I'll save a few bucks. Thanks Wise decision. You can always add one later if you find out that your barrel is horribly overgassed for the ammo you shoot. If you plan to shoot bulk .223 ammo mostly and not full power M193 or M855 5.565 ammo, you may actually benefit from the rifle being a bit overgassed, as it will handle the most commonly sold bulk ammo better without reliability issues. Many OEM barrel makers are now purposefully making the gas port a little larger than needed for hot 5.56 ammo, just so that the rifles they sell cycles better with what is sold in most stores today. If you get into 3 Gun or decide to go with a suppressor, you can change to an adjustable gas block later. It's not difficult to swap out. |
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