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I'm thinking of buying this gun and replacing the standard handguard with a free float rail to start off. What LENGTH rail should/can I get for this gun? Thank you in advance for any help.
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Hugens, If you replace carbine length gas block with a low profile gas block that fore end hand guard goes over you could use a variety of lengths up to 12\". If you keep the factory gas block then 7\" handguard would fit. Here are a couple that are not free float:----------budsgunshop.com/catalog/product_info.php/products_id/81610/aim+sports+mt021+base+for+m4+weaver+style+black+finish------------budsgunshop.com/catalog/product_info.php/products_id/82712/pro+mag+pm242+ar-15%2fm4+rifle+nylon%2faluminum+black
/>To free float you would have to install free float handguard tube. Remove handguard. Separate lower and upper. Drive out gas tube roll pin. Remove gas tube. Remove muzzle device. Remove sight base/gas block slide it off barrel. Using AR wrench and breaker bar remove barrel nut along with delta ring assembly. Install new free float barrel nut. Tighten to 35lbs with torque wrench. Then install gas tube and roll pin in front sight base/gas block. Slide float tube and gas tube/gas block. Tighten tube. replace muzzle device. Drive in taper pins on gas block. Reassemble upper and lower.