I like the looks of the LaRue but they are hard to find in stock. It is also going to depend on what hand guard you are using. I was using a mil spec micro gas block but since Daniel Defense started making their lite rails piston friendly, the only micro gas block that fits under it without any grinding is the gas block from spike's tactical. I like gas blocks with screws on the bottom so that I can dimple the barrel, locktite the threads and stake the holes. It adds extra protection from backing out when pinning is not available.
"Perfect Practice Makes Perfect"
"There are 550 million firearms on this planet. That's one firearm for every 12 people. The question is... How do we arm the other 11?" Lord of War.
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." Thomas Jefferson
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