Mountain Billy Gun Lab GOAT-15 ATOM .22 LR 7.8" Single-Shot Pistol

The Mountain Billy Gun Lab GOAT-15 ATOM is a single-shot .22 LR pistol that delivers the look and controls of a modern AR in a trim, trail-friendly rimfire package. Proudly Made in the USA, it is built around a black polymer upper and lower that slashes weight without sacrificing durability, so it barely tips the scale on the trail or at the bench.

A 7.8" black oxide threaded barrel is suppressor-ready and pairs with a full-length Picatinny optics rail and M-LOK handguard slots, letting you mount red dots, lights, lasers, and accessories exactly where you want them. A familiar thumb safety keeps operation intuitive, while the black polymer grip sits comfortably in the hand for long range sessions or pack-in carry.

Chambered in affordable, low-recoil 22 LR with a 1-shot capacity, the ATOM is a fun, approachable rimfire built for plinking, training, and lightweight pack-in use. Simple, reliable, and small enough to toss in a pack, this is AR-style shooting distilled to its essence in a single-shot package.

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