AAC barrels at Midway

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Re: AAC barrels at Midway

Post by silencertalk » Sun Dec 26, 2010 11:18 pm

I consider these premium barrels. They are made to AAC engineering drawings on CNC equipment which is why the price is not high considering their features (I paid $796 for an AI barrel with a thread protector). They benefit from us having access to Remington drawings for fit but the chambers do not use Remington reamers. They also benefit from our knowledge to hold threads concentric to the bore, and the drawing requires it.

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Re: AAC barrels at Midway

Post by cpti » Thu Dec 30, 2010 5:22 pm

These are stainless or CM?

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Re: AAC barrels at Midway

Post by silencertalk » Thu Dec 30, 2010 5:57 pm

Bolt guns barrels are 4140, AR barrels are 4150.

Because you are asking - that makes me think I need to clarify - CM is better for barrels which are nitrided. Stainless is only barrel for raw barrels.

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Re: AAC barrels at Midway

Post by cpti » Thu Dec 30, 2010 6:15 pm

I was looking at picking up the medium contour barrel, cutting it to 14.5, pinning a 51T, and fluting it to reduce weight. I'm sure the cutting wouldn't be a problem, but I don't want to worry about recoating 4140.

Maybe I'll just cut/pin rather than flute.

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Re: AAC barrels at Midway

Post by silencertalk » Thu Dec 30, 2010 9:03 pm

If you fluted it you would need to Gunkote it. Carbide tools would be needed.

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Re: AAC barrels at Midway

Post by 700PSS » Thu Dec 30, 2010 9:36 pm

That black nitride is some badass stuff. Extremely hard and corrosion resistant. It will destroy most tools. I would not mess with it. Why not just get the 16" light contour barrel and be happy?

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Re: AAC barrels at Midway

Post by cpti » Thu Dec 30, 2010 9:50 pm

700PSS wrote:That black nitride is some badass stuff. Extremely hard and corrosion resistant. It will destroy most tools. I would not mess with it. Why not just get the 16" light contour barrel and be happy?
I'm shooting almost exclusively subsonic with this, so I don't need the extra length; I'd go with the LW profile, but it doesn't have the material to accommodate threading if you chop it. I even considered going shorter (11-12" or so) and SBR'ing it. I still may, but I don't know if I want to go through the paperwork. In either case, I wanted to flute out the medium contour to drop weight. I suppose chopping 4" or so off would bring the medium contour to almost the LW contour weight.

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Re: AAC barrels at Midway

Post by 700PSS » Thu Dec 30, 2010 9:59 pm

You might be better off with a custom barrel or maybe one of the many (growing number) of 300 BLK barrel makers.

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Re: AAC barrels at Midway

Post by cpti » Thu Dec 30, 2010 10:09 pm

700PSS wrote:You might be better off with a custom barrel or maybe one of the many (growing number) of 300 BLK barrel makers.
I'm sure you're right. Between the cutting/shipping I'd be at about $500 for my barrel.

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Re: AAC barrels at Midway

Post by cpti » Fri Dec 31, 2010 3:02 am

One more thing,

How do the contours on the AAC barrels line up with the OEM contours?

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Re: AAC barrels at Midway

Post by silencertalk » Fri Dec 31, 2010 11:03 am

The medium barrel is heavier than an OEM varmint contour near the action (but makes up for it later on with the taper), and so unless you get an M24 type stock, you can expect to need some inletting.

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Re: AAC barrels at Midway

Post by DesertRat » Tue Jan 18, 2011 12:41 am

Is there any downside to the 1:8" twist if I'm going to use 175 gr. SMK's supersonic exclusively?
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Re: AAC barrels at Midway

Post by silencertalk » Tue Jan 18, 2011 2:39 am

I highly doubt it.

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