Gorilla GF-10: Lightweight Hunting Semiauto in 8.6mm Blackout (w/ Ballistics Gel)

Today I’ve got on of Gorilla Ammo’s GF-10 rifles to do some shooting with. It’s an AR-10 platform chambered for 8.6mm Blackout (they also offer it in .243 Win, .260 Rem, 6.5CM, and .308 Win). It weighs in at just 7.2 pounds with a 16″ barrel, so it’s not an NFA item (they do also offer a 12″ pistol pattern). I’ve got my Q Porq Chop on it as a suppressor, and I’m using subsonic ammo – with this combination it is sort recoiling and completely hearing-safe. The loudest part of the gun is the action clacking closed after each shot. I only put about 40 rounds through it (thanks to the cost of 8.6 ammunition…) but I had no malfunctions of any kind, and it made a nice consistent ejection pattern.

We also took the opportunity today to put a round of Gorilla’s 342gr subsonic expanding ammunition into a block of Clear Ballistics gel – and holy cow. It’s a bullet designed to expand while retaining all its mass, and it sure does. The utility of the 1:3″ rifling of the 8.6mm cartridge is that it provides a massive amount of rotational energy to allow the bullet to expand reliably even if it’s traveling relatively slowly at range. It came out of the gel looking like an honest-to-goodness grappling hook…


  1. I think that 1:3 twist really helps the subsonic bullet expansion as usually subsonic bullets really struggle to expand. I love the round and idea but it’s too expensive right now.

  2. I am surprised you didn’t build an 8.6 on the x17 Perun. With a 12in barrel that would be an awesome suppressor host. Cool rifle, cooler caliber, coolest gun host. Keep it up!

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