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Mountain Billy GOAT-15 Atom .22 Lr 7.8" Barrel 10 Round
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$449.99
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SKU: MBGL-GOAT15-ATOM-1-850022225505
Overview
Built for shooters who want a compact rimfire option, this AR-style pistol emphasizes portability and straightforward handling. Its lightweight polymer construction and .22 LR chambering make it a practical choice for new shooters, youth, or anyone looking for an easy-to-carry setup for range time. The 7.8-inch barrel, semi-automatic action, and included 10-round magazine support simple, low-recoil shooting sessions. With a Picatinny rail and M-Lok rail, it also provides a familiar platform for adding compatible accessories.
Why Hunters Choose the Mountain Billy Gun Lab
Ultra-lightweight Design
At 1 lb 14 oz
Compact 7.8-inch
Barrel and 14.1-inch overall length
Ar-style Pistol
Format offers familiar controls and
Ships Both
Both 1-round and 10-round magazines
Standard Picatinny
M-LOK provides accessory mounting options
Key Features
- Ultra-lightweight .22 LR AR-style pistol built for portability and easy handling.
- Unloaded weight is 1 lb 14 oz; loaded weight with 10-round magazine is 2 lb 2 oz.
- Features a 7.8-inch CMV steel barrel with 1:16 RH twist and black oxide finish.
- Uses a blow back, semi-automatic action with a patented tamper-resistant safety.
- Polymer upper and lower with standard Picatinny rail and M-Lok.
- Ships with 1-round and 10-round magazines.
Best Used For
- New shooters wanting a lightweight .22LR AR-style pistol for easier handling and familiar controls.
- Youth or smaller-framed users who need a compact, low-recoil platform for range practice.
- Hunters seeking a portable rimfire pistol for informal shooting sessions and training days.
- Shooters who prefer a simple semi-automatic setup with included 1-round and 10-round magazines.
- Users wanting an ultra-light option for all-day carry at the range or in the field.
Specifications
| Action | Blow Back, Single Shot, Semi-Automatic |
|---|---|
| Barrel Length | 7.8" |
| Barrel Material | CMV Steel |
| Blade Finish | Black Oxide |
| Cartridge | .22 Cal |
| Lower | Polymer |
| Magazine | Ships with 1 Rd and 10 Rd |
| Overall Length | 14.1 in |
| Rail | Standard Picatinny Rail With M-Lok |
| Safety | Patented Tamper Resistant |
| Twist Rate | 1:16 RH |
| Upper | Polymer |
| Weight Loaded 10 Rd Magazine | 2 lbs 2 oz |
| Weight Unloaded | 1 lb 14 ounces |
Pros
- Ultra-lightweight design at 1 lb 14 oz unloaded for easy carry and handling.
- Compact 7.8-inch barrel and 14.1-inch overall length support portability.
- AR-style pistol format offers familiar controls and layout.
- Ships with both 1-round and 10-round magazines for flexibility.
- Standard Picatinny rail with M-LOK provides accessory mounting options.
- Patented tamper-resistant safety adds an extra layer of control.
Considerations & Trade-offs
- Chambered in .22 LR, so it’s suited to rimfire use rather than centerfire applications.
- The 7.8" barrel and 14.1" overall length make it compact, but that also means less sight radius and a shorter platform than full-size AR-style firearms.
- It ships with 1-round and 10-round magazines, so capacity is limited to the included 10-round option unless additional compliant magazines are used.
- Polymer upper and lower keep weight down, but the trade-off is a lighter-feeling build compared with all-metal platforms.
Suggested Comparisons
- AR-style pistols
- .22 LR pistols
- Youth training firearms
- Lightweight range pistols
Suggested Accessories
- AR-style pistol case
- .22 LR ammunition
- Picatinny rail accessories
- M-LOK accessories
Frequently Asked Questions
What comes included with the GOAT-15 ATOM magazine setup?
It ships with 1-round and 10-round magazines.
Is the GOAT-15 ATOM a rifle or a pistol?
It is an AR-style pistol chambered in .22 LR.
What are the listed weight figures for this pistol?
The listed unloaded weight is 1 lb 14 oz, and the weight with a loaded 10-round magazine is 2 lbs 2 oz.
What barrel details are provided by the manufacturer?
The product lists a 7.8-inch barrel with 1:16 RH twist and Black Oxide finish, and identifies it as CMV steel.
What rail setup does the GOAT-15 ATOM have?
It is listed with a standard Picatinny rail with M-LOK.