Close Search
September 2021
Author: Garth Jenson

The Mountain Shadow Carbon, weighing in at just 5 3/4 pounds, is a compact, lightweight rifle that packs a heavyweight punch. It features patented Bolt-to-Bore AlignmentTM for exact concentricity and patented No-Fail CyclingTM for guaranteed operation. With its match-grade, hand-lapped, carbon-wrapped barrel and innovative stock design, you'll enjoy guaranteed sub 0.25" three-shot groups with AllTerra’s custom ammunition and sub 0.5" three-shot groups with premium factory ammo.

Design, research, and testing of the Mountain Shadow spanned nearly five years with valuable input from more than 50 hard-core sheep hunters and guides who know what they need from a lightweight, long-range rifle. During that time, we developed custom loads specifically for this rifle that produce velocities from a 20-22" barrel that exceed the performance of popular loads in a 26" barrel.

“In today’s long-range rifle market, standing out in the crowd can be very difficult. When I came across a relatively newcomer to the long-range rifle industry claiming sub 0.25" groups, I had to dig in and find out what AllTerra Arms was all about. The Mountain Shadow Carbon nailed all the specs for weight and quality components that I look for in high-quality custom hunting rifle. I went with a 6.5 Creedmoor in the Mountain Shadow Carbon with AllTerra custom ammo to test out the sub 0.25" grouping for myself. To say I was impressed would be an understatement! Within a couple zeroing shots and 10 verifying shots for velocity from 100 to 600 yards, I was ranging and dialing for targets out to 800+ yards and drilling them. The long- range rifle industry is one of the hardest industries right now to stand out in, and after handling the Mountain Shadow Carbon, I can honestly say that AllTerra Arms is casting a shadow on most of the competition.” – Garth Jenson, Hunt Advisor

MSRP: $5,995 (starting base model)

For more information, go to