Gunsmithing & Gun Parts ▶ Gun Parts by Gun Make & Model ▶ AR-15 ▶ Barrels ▶ 223 Remington & 5.56x45mm NATO ▶ 20" and Greater ▶

AR-Stoner Barrel AR-15 223 Remington (Wylde) SDM-R Contour 1 in 8" Twist 20" Fluted Stainless Steel

Product #: 577053 AR-Stoner #: StonerSDM-R SS

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$259.99

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AR-Stoner Barrel AR-15 223 Remington (Wylde) Medium Contour 1... $259.99 Available

Product Information

Based on the barrel used on the U.S. Army SDM-R (Squad Designated Marksman Rifle), this barrel is match chambered and features a 1 in 8" twist for shooting match-type bullets to extended ranges with supreme accuracy. The 223 Wylde chamber was designed by noted AR-15 competitor Bill Wylde for use with competition 223 Remington loads. This chamber works with cartridges having an overall length of 2.445, as opposed to the SAAMI specifications of 2.260" for 223 Remington and 2.550" for 5.56x45mm NATO. This barrel is manufactured from 416 stainless steel and features a threaded muzzle.

Gas Tube Length: Rifle Length
Gas Block Diameter: 0.750"
Muzzle Thread: 1/2"-28
Muzzle Thread Engagement Length: 0.620" with a tolerance of .005"
M4 Feed Ramps: Yes

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Customer Reviews

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REVIEW SUMMARY

by PowerReviews

4.3

(based on 4 reviews)

Reviewed by 4 customers

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Displaying reviews 1-4

1/8/2012

(1 of 1 customers found this review helpful)

5.0

I purchased this barrel ...

By Chris

from Cape Neddick, ME

I purchased this barrel for the price (reasonable) and my first AR 15 build. (Most of the gun is DPMS) As already said already, the flutes are very sharp and the feed ramps required a good bit of polishing. The gas block fit perfect and the barrel installed perfect. I put 50 rounds through it in the first shoot, from the bench at 90 yards with 55 grain American eagle FMJ. The first group, after sighting in at 50 yards, 5 rounds under an inch from the bench. My reloads, 69 grain Nosler match HPBT under an inch, 10 rounds, and I haven't tuned a load yet. This was for break in and check function. So far very impressed and I think it will only get better after I work a load up. I would recommend this barrel for its light weight and accuracy.

11/5/2011

(2 of 3 customers found this review helpful)

4.0

Getting great groups with ...

By Michael

from Tyler, TX

Getting great groups with 75 grain ammo ( less that 1 inch ), getting ok groups with xm855 (2 to 2.5 inches)ammo, my only complaint would be that at least on my barrel the feed ramps needed quite a bit of polishing. Before I polished them had to use the forward assist on the initial charge of the mag.

12/20/2010

(2 of 2 customers found this review helpful)

5.0

I got the barrel,, the ...

By jim

from Bertram, TX

I got the barrel,, the flutes are sharp, and the portion of the barrel the gas block goes on was Right on the money,,, I measured it, an aluminum gas block,, went right on,I put my JP enterprises Steel gas block, on the gun; I had to tap it on with a block of wood. And a small hammer. Not a big problem.I bought a new Rifle length gas tube and I had to file off just a little bit so that the bolt would close all of the way.I shot 3 different hand loads out of the Gun, they all shot just at or just under one inch at 100 yards.Going from a 16 inch barrel to this 20 inch gave me 300 FPS more velocity. So far so good. This was just what I was looking for!

8/5/2010

(2 of 4 customers found this review helpful)

3.0

The gas block diameter of ...

By Robert

from Sidney, NE

The gas block diameter of the barrel I bought was over sized. I had to take it to my friendly gunsmith and turn it down on his lathe to fit a YKM low profile gas block. It was very coarsely finished also, with tool marks from turning. The flute edges were also quite sharp. This barrel needs a little more attention to its finish. I hope it shoots well. Will leave another review after firing for accuracy

Displaying reviews 1-4

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