Home AR-15 Quick Tip: What Is a Free-Floated AR-15?

Quick Tip: What Is a Free-Floated AR-15?

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Even if you’re new to AR-15 World, you’ve probably heard the term “free-floated handguard” or “free-floated barrel” or sometimes just “free-floated AR-15.” What’s this free-floating all about? Brownells Gun Tech™ Caleb Savant explains it for us. The front of the standard military-type, drop-in AR-15 handguard attaches to the front sight / gas block, which is of course attached to the barrel. A free-floated handguard DOES NOT touch the barrel assembly in any place. Its only contact point on the rifle is where it attaches to the receiver. This means that whatever accessories you mount on the handguard won’t exert pressure on the barrel that could adversely affect accuracy. A free-floated handguard gives you a potentially more accurate AR-15. Unlike a traditional bolt action rifle, an AR-15’s barrel CANNOT be free-floating because of the gas block and gas tube. The rear of the gas tube directly contacts the gas key on the bolt-carrier group. So a “free-floated” AR-15 is one with a free-floating handguard.

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42 COMMENTS

  1. If your gas system is short stroke piston system, the gas tube is not contacting with the bolt carrier gas tube extension. Would that make the AR15 barrel free floated then?

  2. I’ve bumped my free float barrel a few times on the table at the range, does bumping it too hard on accident damage anything? Such as accuracy or anything in that matter ?

  3. Just out of curiosity, what if you removed the gas block and tube. Compared group size and impact point to with the block and tube. How much difference would it make ? Could be a fun little experiment.

  4. Totally agree. I always wondered when someone would say they had a free floated barrel on their AR 15. I'm thinking what??? Top Notch Hair as always Caleb.

  5. A good counter argument could be made though that because the bcg is in the upper that it's just a temporary support structure behind the center of gravity that it is no different than saying because it has a barrel nut that it's not a free float. The barrel on the AR platform technically isn't as permanent as some bolt guns with pressed in or screwed in barrels. Just like technically the AR is an internal piston gun, but it's always called di. Even in the army the board question for describing the M-16 series rifle was direct impinged, gas operated, magazine fed, shoulder fired rifle with a 1/7 twist capable of single shot or 3 round burst. Or something like that, it's been a few years since I had to remember that question

  6. I don't disagree that the gas tube does technically preclude the AR-15 barrel from being completely free floated, but it's hard to argue with accuracy gain by free floating the hand guard. I've never had one that didn't shoot some measure of better with a free float handguard. Which by and large is why most any rifle will shoot better with a free float barrel.

  7. Can't disagree with that but a free float hand guard offers minimum possible interference with barrel harmonics when you consider that a direct impingement gas system offers very little interference, especially compared to a piston driven system. I'm a huge fan of free float hand guards for ARs built for high accuracy.

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