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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 04-07-2008, 7:26 PM
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Default free float rail vs non free float rail

I'm new to AR15/M4 style rifles. What is the major difference between the two?
Performance/ Accuracy ease and tools needed to install.
Is it worth it to go with a free float set up? I want a rail system, just can't decide between the two. Lastly what is the best brand for the money?

Thanks for any input.
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Old 04-07-2008, 7:33 PM
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Old 04-07-2008, 7:38 PM
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Free Float for better accuracy.
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Old 04-07-2008, 8:00 PM
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Originally Posted by jandmtv View Post
I DID! I DID! I DID!
Couldn't find the answers I asked above. If you have a link that answers my qestion(s) please post it.
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Old 04-07-2008, 8:04 PM
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http://www.calguns.net/calgunforum/s...ght=free+float

practice your search-fu
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Old 04-07-2008, 8:10 PM
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You just had to to click that smily 3 times. It` soooo much fun, isn`t it?
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Old 04-07-2008, 8:14 PM
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free float means that the barrel is touching nothing. like a hunting rifle, do you see the barrel touching the stock or a bayonet or a front sight? no.

that means better harmonics and a better shot, just a barrel straight out.

Each thing you add causes infrequency to the harmonics, like a flash hider, front sight, gas tube, and especially in ARs, a front handguard retainer. It will still be accurate but not as gnats'*** as a free float.

Why doesnt the military use free floating ARs? Cause we want a bayonet lug and to lunge a bayonet in an enemy and pull up with 400lbs of force, you REALLY need a handguard retainer and a good point to stabilize the barrel from bending or ripping out of the receiver.

For most civilians and some spec ops units, a free floater is the way to go as it does provide good cooling and a tad more accuracy.

and for what its worth, I tried searching too, to no avail.
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Old 04-07-2008, 8:16 PM
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You just had to to click that smily 3 times. It` soooo much fun, isn`t it?
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  #9  
Old 04-07-2008, 9:08 PM
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Quote:
Originally Posted by Rem1492 View Post
free float means that the barrel is touching nothing. like a hunting rifle, do you see the barrel touching the stock or a bayonet or a front sight? no.

that means better harmonics and a better shot, just a barrel straight out.

Each thing you add causes infrequency to the harmonics, like a flash hider, front sight, gas tube, and especially in ARs, a front handguard retainer. It will still be accurate but not as gnats'*** as a free float.

Why doesnt the military use free floating ARs? Cause we want a bayonet lug and to lunge a bayonet in an enemy and pull up with 400lbs of force, you REALLY need a handguard retainer and a good point to stabilize the barrel from bending or ripping out of the receiver.

For most civilians and some spec ops units, a free floater is the way to go as it does provide good cooling and a tad more accuracy.

and for what its worth, I tried searching too, to no avail.
You're pretty much right about everything... but not quite on that adding something is an issue. It's CHANGES in harmonics that are the problem. All barrels have harmonics and undergo motion when firing. A free float rail keeps you from contacting the barrel during firing, which increases accuracy.

Also, the idea that the reason for not free floating M4s &M16s has to do with anything but cost for the military is just wrong. You can still use a bayonet. It will be just as strong. The barrel and the free float rail (if installed correctly) are just as strong as one another.
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Old 04-07-2008, 10:29 PM
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picture = 1000 words.



Picture courtesy of Molon on AR15.com
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  #11  
Old 04-07-2008, 11:02 PM
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the link i posted above has that pic on it
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Old 04-07-2008, 11:07 PM
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the link i posted above has that pic on it
He's just showing off.
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Old 04-07-2008, 11:08 PM
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http://www.valerosos.com/

The 65th Infantry Regiment distinguished themselves during the Korean War in the battles for the Chorwan Reservoir, the Evacuation of Hungnam and the Chinese counter offensive of April 1951. Among their distinctions was the last battalion sized bayonet charge in US Military History.
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  #14  
Old 04-07-2008, 11:10 PM
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Quote:
Originally Posted by jandmtv View Post
the link i posted above has that pic on it
Not everyone clicks links.
I didn't.
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Old 04-08-2008, 7:19 AM
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thanks for all the great information guys. Now, how challenging would it be to but on a free floating rail over a no free floating rail. Lastly, what brands do you recommend?
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  #16  
Old 04-08-2008, 7:29 AM
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Quote:
Originally Posted by POINTMANDDT View Post
thanks for all the great information guys. Now, how challenging would it be to but on a free floating rail over a no free floating rail. Lastly, what brands do you recommend?
You need proper tools. Upper rec vice clamp, armorer's wrench with free float pins. YHM wrench if you go with a Yankee Hill Free float. Torque wrench is a plus but not neccessary but if you do, start at 30-lbs and work your way up. My YHM free float lined up perfectly at 38-lbs of torque. I have both MI and YHM free floats and both works great.
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Old 04-08-2008, 7:43 AM
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get yourself the right tools if you are doing a conversion from handguard to free float. the dremmel crap, cutting off the handguards, is easy but stressful at the same time. plus you get alot of metal shavings everywhere, that could possibly cause rust.
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Old 04-08-2008, 7:51 AM
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If you have a carbine, just get the Daniel Defense Omega, or have your rail professionally installed.
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Old 04-08-2008, 3:29 PM
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For FF forearms, there are tons of choices. Let me name a few:

Yankee Hill Machine (YHM), JP Enterprises, Daniel Defense (DD), DPMS (most likely YHM), Midwest Industries (MI), Troy Industries, Vltor, A.R.M.S., Surefire, LaRue Tactical, Knight Armament (KAC), Precision Reflex Inc (PRI), Badger Ordnance......


Some need special tools, some need only standard barrel nut wrench. Check the DIY/Gunsmithing forum to get more info. Or ask our walking dictionary "AR15Barrels". He's the AR guru here.
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  #20  
Old 04-08-2008, 6:55 PM
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Default free float. BAH HUMBUG!!!

I set myself up with the UTG Quad rail from Cheaper Than Dirt, only cost me about $60. And I have mounted a light and a front pistol grip to it. Its sturdy and easy to install. Forget spending Hundreds, its really not going to make a difference!!!
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  #21  
Old 04-08-2008, 9:43 PM
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I set myself up with the UTG Quad rail from Cheaper Than Dirt, only cost me about $60. And I have mounted a light and a front pistol grip to it. Its sturdy and easy to install. Forget spending Hundreds, its really not going to make a difference for someone who can't shoot anyways!!!
fixed it for you.

Say, didn't you have all kinds of problems with accessories fitting on your UTG?

You need to cut down on the exclamation points, too.

And Cheaper than Dirt is pure evil to Californians... they consider a collapsible stock for an 870 Remington an Assault weapon part and will not ship to CA.
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Old 04-08-2008, 9:52 PM
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And Cheaper than Dirt is pure evil to Californians... they consider a collapsible stock for an 870 Remington an Assault weapon part and will not ship to CA.
Maybe they think it has something to due with the collapsing stock market
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  #23  
Old 04-08-2008, 10:09 PM
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fixed it for you.

Say, didn't you have all kinds of problems with accessories fitting on your UTG?

You need to cut down on the exclamation points, too.

And Cheaper than Dirt is pure evil to Californians... they consider a collapsible stock for an 870 Remington an Assault weapon part and will not ship to CA.
LOL!!!
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  #24  
Old 04-08-2008, 10:50 PM
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Quote:
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Say, didn't you have all kinds of problems with accessories fitting on your UTG?
What are you talking about? All kinds of Airsoft stuff fits on there.
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