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AR15.COM
1/15/2025 9:43:59 PM EDT
Hi all,
Just took my new 9mm Sub2k out for the first time. I shot 115, 124, and 147 gr out of 3 different magazine. I had jams where the fresh round was vertical with every combo of magas and bullet weight. 1 factory mag, 1 glockenspiel 33 rd, and a magpul 50 rd.

What should I do, break it in with a couple of hundred rounds? I like the way it shoots, darn accurate at 20 yds.
1/16/2025 7:08:54 AM EDT
[#1]
Make sure you hold it tight into your shoulder. They will jam like crazy if you don't.
1/16/2025 9:40:09 PM EDT
[#2]
OK, good to know.
11/9/2025 4:47:37 PM EDT
[Last Edit: Jacketch][Edited] [#3]
Quote History
Originally Posted By drobs:
Make sure you hold it tight into your shoulder. They will jam like crazy if you don't.
View Quote

I've also found that to be true. It hasn't solved all my feed issues but it sure helped. I've got about 350 rounds through my Sub2K gen3 and the Glock mags worked the best. The Pmag magazines didn't work as well and the Amend mags were the least reliable. I'm hoping that running a lot more ammo through it will help too.
2/16/2026 9:51:49 PM EDT
[#4]
That's unfortunate to hear about op. I often wonder if the MCarbo steel ramp would make a difference.
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