Eric and Heidi founded Mountain Billy Gun Lab after 30 years working in the firearms industry. Their combined passion for hunting, shooting sports, and off-the-grid adventures drove them to solve a problem: existing AR-15 platforms were too heavy and too much recoil for serious training, small-frame...
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Full description and what we offer
Eric and Heidi founded Mountain Billy Gun Lab after 30 years working in the firearms industry. Their combined passion for hunting, shooting sports, and off-the-grid adventures drove them to solve a problem: existing AR-15 platforms were too heavy and too much recoil for serious training, small-frame shooters, and backcountry work.
The result? The GOAT-15 line—ultra-lightweight .22LR rifles that function like modern sporting rifles but weigh barely 3 pounds loaded.
All GOAT-15 models are chambered in .22LR and made in the USA with premium polymer and aluminum construction. They're engineered to be 20% more compact than standard AR-15s while maintaining reliability and accuracy.
| Model | Barrel | Length (Extended) | Weight (Unloaded) | MSRP | Best For |
|---|---|---|---|---|---|
| HELIUM | 16" CMV Steel | 27.75"-30.75" | 2 lbs 14 oz | $469.99 | Full-size rifle, plinking, family range days |
| H2 SBR | 7.5" CMV Steel | 19.25"-22.25" | 2 lbs 2 oz | $489.99 | Compact carry, hiking, steel competitions |
| ATOM | Pistol-length | Compact | ~2.5 lbs | $479.99 | Backpack carry, survival prep, pistol training |
Ships with: 1-round and 10-round magazines, 7-position adjustable buttstock, Picatinny rail with M-Lok slots, polymer construction throughout.
Mountain Billy sells exclusively to verified FFL dealers—consumers cannot purchase directly from the manufacturer. They offer:
Consumers can purchase accessories and branded merchandise directly from the website.
All Models Feature: - Blow-back action, semi-automatic - Polymer lower and upper receivers - CMV steel barrel, 1:16 right-hand twist, threaded 1/2-28 - Standard Picatinny rail with M-Lok - Sights not included (red dot recommended) - Restricted in: California, Delaware, DC, Hawaii, Illinois, New Jersey, New York, Rhode Island
"The best, safest, modern sporting rifle-style firearm available." — Art Merrill, NRA's Shooting Sports
Small game hunting. First-time shooters. Backpack-ready survival rifles. Family range days. Steel challenge competitions. Snowmobiling adventures. Dry-fire training at home. Every application demands a rifle that doesn't weigh down your pack or your shoulders.
Mountain Billy maintains an active blog covering hunting tips, gun safety, and firearm selection. They've been featured in reviews from PSA, AT3 Tactical, 22Plinkster, Military Arms Channel, Tiberious Gib, and Tactical Advisor.
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