What 6.5 Grendel Magazines Are Best?

[LRRPF52]

I’ve been focused on the 12” Grendel for the past few years, which started in 2017.

So far, I have run 17rd Elander, 25rd CProducts, and 10rd Amend2 polymer mags.

Zero feeding issues or malfunctions of any kind, with the exception of when I shot it unsuppressed with 90gr TNT, which short-stroked the 12” CLGS system 3x. As soon as I attached the suppressor, the 90gr TNT ran like a raped ape across all 4 gas system settings from wide open to fully suppressed choke on the Bootleg Adjustable Gas carrier. 120-123gr ran fine unsuppressed and suppressed.

I have shot cases of 123gr American Gunner, a few hundred 120gr Federal OTM American Eagle, and am into my 2nd case of 123gr ELD-M.

I’m mainly using the 25rd CProducts mags.

With the Amend2 mags, I loaded them up and left them in the rifle case for well over a year before I even shot those.

A caveat with any of my builds is that I go through an extensive build list relative to the bolt, chamber, barrel extension, gas tube, gas block, barrel fit to the upper, and buffer/recoil spring assembly.

For feeding, I de-edge, blend, and polish my feed ramps. I also make sure the ejector is rounded/chamfered and polished so that it doesn’t bind against right side feed presentation from the magazine.

I also make sure the extractor isn’t sharp-edged, to prevent binding during ejection, which is a problem for improperly-made extractors.

I don’t just bash a bunch of parts together and hope for the best. There are decades of lessons-learned that go into how I approach the build process to set me up for success with reliability and accuracy.