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Gas Block .75" Gas Block High Profile Top & Bottom Picatinny weaver Rail .750" barrel AR15 223 5.56 (HGB) - ar15handguard.com
Sniper AR-15 Mid-Length 11.75" Gas Tube with Roll Pin plus Low Profile Railed Gas Block for 0.750" Barrel Diameter | Best Source for Rail Mounts, Aftermarket Parts and Accessories
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