Mountain Billy Goat-15 Helium 22 Long Rifle 16in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - The GOAT-15 HELIUM by Mountain Billy Gun Lab is a lightweight, American-made .22 LR rifle built for portability, precision, and everyday utility. Designed in a modern sporting rifle style with a tamper-resistant safety, it's well-suited for training, competition, and outdoor use. Its rugged polymer construction offers durability without added weight, while the compact, ergonomic design ensures easy handling and versatility in any environment. Threaded Barrel: 1/2 x 28 ; Safety: Patented Tamper Resistant; Polymer Upper and Lower;