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This is what you are looking for. - Trinity Force Gas Block M4/AR15 Quad Rail for .75in Barrel

by John, from NC, United States Written on April 8, 2015
Review for Trinity Force Gas Block M4/AR15 Quad Rail for .75in Barrel
Trinity Force Gas Block M4/AR15 Quad Rail for .75in Barrel
Trinity Force Gas Block M4/AR15 Quad Rail for .75in Barrel
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John's Review of Trinity Force Gas Block M4/AR15 Quad Rail for .75in Barrel

Very good quality AR-15 gas block with rail height at same height as A4 style optics ready upper receiver picatinny rails. Works great for installation of iron sights. Has set screw in top picatinny rail that can be set into barrel. My CMMG wasp barrel was not pre-drilled for the set screw so I drilled a set screw recess into the barrel. However, the use of the set screw is not required. Great for adding flash lights etc if you use a floating handrail
Would Recommend: Yes
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