Group Buy barrels any good?

[LRRPF52]

One thing about shooting 5.56 compared to Grendel is that your fundamentals have to change to get a lightweight Grendel to shoot as well.

5.56 ARs are very easy to group with for me as there is hardly any recoil at all.

With Grendel and AR10s, you have to apply more rearward pressure on the grip, pulling the stock straight into your stock weld into your chest or shoulder pocket, however you choose to place the butt for the best optical alignment of your eye to the scope without having to move your head to the rifle.

With the 2 samples of 12" Group buy barrels I used for 2 different builds, they both shoot under 1 MOA consistently with different loads and different shooters.

I check receiver face for squareness and bed the extensions. On one of these builds, it was an interference fit that required hours of pounding to get the barrel into the 2A Balios Lite upper.

I can rapid-fire 5rd Groups like this with both of them:



Other shooter zeroing and grouping:





We were shooting suppressed with Bootleg adjustable gas carriers, TBAC muzzle devices and cans, NightForce NX8 on one, 1-4x24 GRSC on the other.

The NX8 center dot covers the aiming point at 100yds, so it's harder to group with but still allowed us to turn-out the groups you see.

We were shooting 120gr Federal Match, 123gr Hornady American Gunner, and 123gr ELD-M Black ammo.

Also, from what I've seen in these chambers, I could load a 140gr way longer than magazine allowable, so I would expect the 120gr ELD-M to shoot well and not be subject to the Grendel's compound throat COL that does better with a secant 123gr.

The other 12" I built for a good friend shoots the 107gr SMK really well on top of 8208XBR for him.