American Air Arms HPS Stalker: The Apex of Compact Lethality
The HPS Stalker is a middle finger to the "bigger is better" mindset. Built one at a time and tuned by hand, this limited-production platform is a purpose-built compact weapon system. It delivers full-size power—up to 90 ft-lbs in .30 caliber—while weighing a staggering five pounds. This is the rifle you take when the mission requires discretion, mobility, and absolute stopping power.
Caliber Dominance: .218 & .300
The Stalker is engineered for maximum energy transfer. By focusing on .22 (.218) and .30 (.300), we've optimized the barrel harmonics and valve dwell to throw heavy lead with surgical precision.
.300 Caliber: The ultimate short-range hammer, pushing up to 90 ft-lbs for decisive terminal performance on larger game.
.218 Caliber: A high-velocity, flat-shooting option that delivers 55 ft-lbs, perfect for stretching the distance on a compact platform.
Internal Innovation: The Teardrop Balanced Valve
At the heart of the Stalker is the new American Air Arms Teardrop Balanced Valve. This system delivers maximum pneumatic efficiency, enabling a feather-light hammer strike that eliminates accuracy-killing vibration. Combined with an externally adjustable regulator and adjustable valve dwell, you have total control over your rifle's "recipe" for any projectile.
Tactical Refinement
Fire-Blue Stealth: The exclusive fire-blue anodized chassis is paired with a custom fluted match barrel and a Thunder QD suppressor for elite sound moderation.
ARCA Swiss Integration: A full-length integrated ARCA rail allows for instant, solid mounting to tripods and shooting supports.
The 0.4 oz Trigger: The match-grade trigger is adjustable from 0.4 to 0.8 ounces, featuring a double-intercepting sear and hammer safety for total mechanical security.
Technical Specifications
Weight: 5 lbs (Ultra-Packable)
Power: 55 ft-lbs (.22) / 90 ft-lbs (.30)
Barrel: Hand-lead lapped SUBMOA match barrel
Fill Pressure: 4500 PSI
Shot Count: 36 (.22) / 18 (.30) per fill
Inclusions: One magazine + Custom-fitted tactical backpack