Rifle length FF on a 16

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[ARCHIVED THREAD] - Rifle length FF on a 16

Posted: 9/30/2004 5:23:53 PM EDT

I just bought a new 16" A3 M4 upper from Model1Sales and really like it. Trouble is, I already have one and I've decided I would like a change.

Assuming I replace the FSB with a shaved gas block, is it possible to install a rifle length FF tube on the 16" barrel? If so, are there any special cinsiderations to keep in mind? I intend to place a flip-up FS on the top rail to go along with the rear ARMS 40.

If someone has done this, do you have any pics of the final product?

Posted: 9/30/2004 7:17:30 PM EDT

[#1]

Sure, as long as the gas block fits under the tube, it's fine.

Posted: 9/30/2004 8:06:57 PM EDT

[#2]

Posted: 9/30/2004 8:43:18 PM EDT

[#3]

Hey, thanks for the help.

Any particular gas block/FF rail combos that just won't work together. Which combo of gas block and FF rail work best?

Posted: 9/30/2004 8:45:20 PM EDT

[#4]

I recommend looking at the PRI low-pro gas block. Knights also makes one about 40% more expensive.

The 6.8SPC upper MSTN built for me has a mid-length gas system with the PRI gsa block under a full rifle-length PRI GenIII float tube.

-z

Posted: 10/2/2004 12:43:34 PM EDT

[#5]

9mm RRA... FF is a little much, but I like it...

Posted: 10/2/2004 3:52:44 PM EDT

[#6]

Hey Spooky, what magwell adapter is that, and what mags does it use?

Jason

Posted: 10/2/2004 5:09:34 PM EDT

[#7]

Quoted:
Hey Spooky, what magwell adapter is that, and what mags does it use?

Jason

I don't know what block it is, but I believe it uses uncut Uzi mags.

Posted: 10/2/2004 5:38:26 PM EDT

[#8]

Quoted:
Hey Spooky, what magwell adapter is that, and what mags does it use?

Jason

Looks like a VM Hy-Tech.

Posted: 10/2/2004 7:20:29 PM EDT

[#9]

Correct - it is a VM Hy Tech, and uses unmodified Uzi mags (IMI are golden, some others are a bit tight). Shoots pretty good but I'm thinking about putting an EoTech on it...

Spooky

U-dog has it's big brother a couple posts up!

Posted: 10/2/2004 7:42:20 PM EDT

[#10]

There is a thred floating around that states it is hard (not ipossible) to use the LaRue rifle length tube, b/c you can't do the gas system first.

Posted: 10/2/2004 7:46:40 PM EDT

[#11]

I can tell you that Using a SPR type block requires a bit of clearence work on the bolck to clear the DD tube,...
Spook I just noticed the Green! looks good

Posted: 10/2/2004 7:50:41 PM EDT

[#12]

www.ar15.com/forums/topic.html?b=3&f=12&t=202178

[ARCHIVED THREAD] - Rifle length FF on a 16

AR-15 » Rifles, Uppers, Lowers, Barrels, and more

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