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Stern Defense SD AR15 Barrel
As Low As $89.99 Save Up to 31%
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Most Helpful Positive Review Great fit and accurate
Using this with a Foxtrot Mike lower, Anderson 458 upper and Stern BCG. Feeds great with the right mag and very accurate. Easily hits 8" steel with cheap dot at 100 meters. Fitment was great (Aero Atlas S) handguard.
Most Helpful Negative Review No feedramp on 9mm barrel!
I bought a 9mm 16" barrel and it came with no feed ramp whatsoever! I was able to cut a feed ramp and use the barrel, as I'm a gunsmith and had another barrel on hand to go by when cutting a ramp. Someone who is not proficient in gunsmithing would not be able to use this barrel as is and would have ...
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Excellent quality great feed ramp

by Ralph, Verified Owner from FL, United States Written on July 19, 2025
Excellent machining fit, and finish. Wide feed ramp that helps loading defensive ammo. Great finish and index pin for no rotation issues. accurately concentric as measured by a suppressor alignment rod.
Would recommend: Yes
Was it helpful to you? Yes | No

Well machined with solid shoulder for suppressor mounting

by Ralph, Verified Owner from FL, United States Written on July 11, 2025
A great choice for a pcc build. The indexing pin adds an extra layer of assurance of no rotation. The profile is lightweight with an ample shoulder for suppressor mounting. Mates well with a tri-lug adapter. Fits perfectly under a 4.8 handguard with the thread just outside of the handguard.
Pros:
  • Lightweight
Cons:
  • None
Best Used for:
  • suppresor mounting
Would recommend: Yes
Was it helpful to you? Yes | No

5" 9mm barrel wrong thread pitch listed

by Ralph, Verified Owner from FL, United States Written on July 10, 2025
After spending an extra 200 on a 1/2x36 tri-lug and mount, come to find out the description is wrong on the thread pitch. The 9mm barrels have standard 1/2x28. So don't mess up your barrel or muzzle device as the 1/2x36 will thread on about 2 turns and then bind up. Now I have to return or buy another tri-lug in the correct thread pitch. Overall however the barrel looks to be of good quality and manufacturing.
Would recommend: Yes
Was it helpful to you? Yes | No

Stern Defense 16 in barrel

by Ed, Verified Owner from NC, United States Written on October 20, 2024
Am building a second upper using this barrel. Fired about 20 rounds through it with no issues. Seems to feed fine. Waiting on the correct Aero handguard to arrive to finish my build. Looks to be compatible with foxtrot mikes Glock mag lowers and bcg but 20 rounds is not enough break in. Looks good to me, nice finish, nice tight fit in my upper. However this style of blowback barrel breach face will not work with a CNC dedicated greasegun magazine lower.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Really?! No feed ramp.

by Rever, Verified Owner from GA, United States Written on December 9, 2022
This came nicely packaged and fit was perfect into my Spartan upper. However, it will not feed anything. Come to find out, it has no feed ramp and it definitely needs one. Now I need to spend even more money at the gunsmith just to make it useable. Actually considering returning it. Such a shame. They need to cut a ramp or at the very least mention on the product page that it does not have one.
Pros:
  • Good fitment
  • Threading is good
Cons:
  • No feed ramp
  • needs a feed ramp for 45acp
Would recommend: No
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

It's really fun but.....

by John Torosino, Verified Owner from MD, United States Written on December 14, 2021
If you don't plan on using there mag well magazine or you make a pistol AR lower you will need to add a feed ramp on the barrel. I'm not a gun smith but I was able to put a feed ramp on the barrel with my dremel. I still had 3 miss feeds and 4 jams on the first go . I also suggest get a heavy duty spring and heavy buffer and you be set .
Pros:
  • Accurate ones you get it working .
  • Accurate once it's set up . A lot of fun to shoot
Cons:
  • No feed ramp
Best Used for:
  • 80% builders
Would recommend: Yes
0 of 1 found the following review helpful.
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great barrrl

by CaliforniaFlo, Verified Owner from CA, United States Written on August 5, 2021
Beautiful barrel, threading may be hard to find muzzle device but no other complaints. No feed ramp so if you need one this doesn’t have it. Worked great in my PCC build with no issues using a fax on bcg.
Would recommend: Yes
Was it helpful to you? Yes | No
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