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Posted: 4/19/2015 10:13:48 AM EDT
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I'm going to ad an adjustable gas block to my Ruger AR556. I don't doubt that I would be ahead of the game just buying one, but it's hard to resist a DIY job when I have the tools to do it.
The gas block I want to mod is not the best choice, but it was free. I don't have room to add a 1/8 inch set screw so I'm thinking a smaller set screw may work. I'm going to guess that most adj. gas blocks block off 10% to 30% of the gas to achieve the desired result. If I use a 1/16 inch set screw I should be able to block up to 50% of the gas and that would be enough to let me find the sweet spot. How far off am I with my assumptions? |
| The adjustables I have used will stop 100% of gas flow. Just using a set screw would work, but it will quickly glue its self in with carbon build up. Or possibly loosen with heat cycles. You would be surprised with how little gas a clean AR will actually run with. Unless you are going to a low mass bcg and buffer you will be better suited tuning with buffers than gas flow. |
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Quoted:
I was also hoping to address the in-my-face gas blow back. It's not much, but if I can change it, why not? I've found that I can use a gas block to effectively alter 1) recoil impulse, 2) locking time, and 3) recoil impulse and locking time... but not blow back. Not without negatively effecting the other two desired results, which are more important to me. I've simply settled with using a gas block to adjust the function of the rifle, and use an altered charging handle to assist in mitigating gas blow back. Two-out-of-three ain't bad. It's just two cents. |
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