Mountain Billy Gun Lab

Mountain Billy Gun Lab Home of the lightest semi-automatic rifle in production

Today we pause to remember the nearly 3,000 lives lost on September 11, 2001, and honor the first responders and service...
09/11/2026

Today we pause to remember the nearly 3,000 lives lost on September 11, 2001, and honor the first responders and service members who ran toward danger to protect others. 🇺🇸

We will never forget.

09/10/2026

Yeah, we'd chase it down too. Meet the GOAT-15.

09/09/2026

Get to know one of our owners - Heidi Schaefer 🐐
She's not shown on here as much as her brother Eric, but she's a busy woman!
She prefers the GOAT-15 Helium. Which of our lightweight fi****ms do YOU prefer? 👇

09/05/2026

Who is spending some time at the range this Labor Day weekend?!
Don't forget to bring the GOAT 🐐

09/02/2026

🚨 Don't just take our word for it. We see your comments and DMs everyday loving the new 20 round magazines!

08/31/2026

A glimpse behind the scenes of our lab making the GOAT-15 🐐

In case you're new here, we're Mountain Billy Gun Lab and we make the world's lightest semi auto rifle that's the perfect training gun, plinking gun, and all around fun gun to shoot. Check out our rifle, SBR and pistol 🔫

🚨 20 round mags are ready for you!! 🚨

08/27/2026

Okay fam - how well do you know the GOAT-15? Do you know what makes it different from a standard AR-15? 👇

****ms

08/25/2026

THE G.O.A.T. when it comes to lightweight fi****ms 🐐

3 reasons you should NOT buy the GOAT-15. 👀1️⃣ Everyone at the range is going to ask about it.2️⃣ You're going to get st...
08/21/2026

3 reasons you should NOT buy the GOAT-15. 👀

1️⃣ Everyone at the range is going to ask about it.
2️⃣ You're going to get stopped mid-reload by someone wanting to see it.
3️⃣ Your buddies are going to want to shoot it more than their own gun.

The lightest semi-auto on the market tends to draw a crowd. 🐐

Still not convinced? Link in bio.

08/19/2026

🚨 Did you know this about the GOAT15 lineup?!

We might be smaller, but you can still throw on your favorite suppressor (even if it's ours) - stay tuned!

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Charleston, UT
84032

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