This is NOT a post-AWB question!


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possenti
September 15, 2004, 08:50 PM
No - I'm not wanting to know where to find hi-cap 10/22 magazines. Those seem to be a popular topic on the gun forums lately. (Keeping my fingers crossed that my Wally-World carries them again.)

Just a simple question about free-floated barrels:

I'm not familiar with the AR-type target rifles, but how can the barrel be truly "free-floating". The handguard may not touch the barrel, but what about the gas tube? Does its contact with the barrel affect accuracy?

The gas tube in an AR is somewhat small and inconsequential, but what about the larger ones in some of the more accurate semi-autos like the H&K's - particularly the PSG-1?

With match-grade rifles, much emphasis is put on not having anything touch the barrels to upset the harmonics/vibrations, but how is this accomplished with gas-operated rifles? I've always wondered about this...

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Dave Markowitz
September 15, 2004, 08:56 PM
Since the AR has a gas tube, the barrel cannot be made truly free floating. However, when a free float tube forearm is used on a match rifle, it allows the shooter to sling up tightly without exerting any pressure on the barrel.

The HKs are not gas operated. They are roller-locked, delayed blowback, so there is no gas tube.

possenti
September 15, 2004, 10:41 PM
OK - what about the M-14's? Dragunovs? Is there any advantage to free-floating these barrels? Does anyone do that with these types of rifles?

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