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Posted: 12/26/2011 10:24:29 AM EDT
| I am thinking about buying a .22lr upper. I'm looking at going with a low profile gas block and see options for rear rail matched height and some that are lower than the rear rail. What are the advantages and disadvantages of both? I would like to install F/R BUIS so I'm assuming it makes a difference there. I'm sure the answer is already here, but I suck at finding it. Thanks for the help. |
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