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keithkb

ad closed 10.5" Noveske SWITCHBLOCK Upper - $280 SPF

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No more gas in your face when shooting suppressed!!

Stainless Steel Switchblock® Barrel

--1 in 7" twist improved polygonal rifling

             With 556 Noveske Match Chamber
--Extended feed ramps 
--Bead blasted finish 
--Pinned Switchblock with Gas Tube 
--1/2x28 threads 
--Medium Contour

Yankee Hill Machine Rail (Modified to allow access to gas block.)

https://www.opticsplanet.com/yankee-hill-machine-rifle-length-smooth-free-float-forearm-ar-15-yhm-5005.html

Generic never fired upper to round off receiver. No BCG included.

 

 

Less than 1,000 rounds through it. Bought it new. Built a different rifle.

 

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Edited by keithkb

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Around 3 or 4 years ago these things were unobtanium. I looked high and low for this exact barrel when I was building my 10.5" SBR and they were nowhere to be found. I finally went with a standard 10.5" barrel and an adjustable gas block. This is an excellent deal for someone. Free bump for you.

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On 7/29/2019 at 11:09 PM, my82cam said:

So, fill me in. How does this work and whats so great about it?  I have an m16 and suppressors, gas in the face sucks.   This better than a piston kit?

Unlike a piston kit, this one is still the traditional gas system. The gas block just has a regulator that reduces the amount of gas needed to cycle the bolt on the short barrel 

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Yes, thanks for weighing in guys. It has three positions. The first position is closed. No gas will travel back up the tube. The second is suppressed. This setting changes the orifice size and restricts gas flow. It cycles beautifully with a can and no overgassing. The third seeing is open. Fully open has block that will cycle without a can. Shooting with a can in this setting still works but you get that has in the face. Having used adjustable blocks in the past, this is a much better alternative to using an alan wrench and guessing at how much to turn it. 

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