SS Airsoft Custom HPA Avalon - SandCat w/ PolarStar Jack

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Prices last checked July 2, 2026 across 1 retailer.

SS AIRSOFT Custom Built HPA airsoft rifle. We build some of the best custom HPA airsoft replicas you will find on the market. All weapons are test fired ,tuned and adjusted to work perfectly right out of the box. SS Airsoft Custom HPA Avalon - SandCat Includes: Elite Force VFC Avalon Calibur II PDW AEG (Tan) PolarStar Airsoft JACK Electro-Pneumatic Gearbox Conversion Kit V2 SS Airsoft IGL Standard Weave Jack 1.1 (Neon Green) Laylax Prometheus ARP 9 Inner Barrel 6.03 128mm Amoeba Front Modular Locking Hand Grip (Black) PEQ-15 L.E.D. White Light + Green Laser (Black) Axeon Optics MDSR1 Micro Dot Sight w/ Riser SpeedQB x AceTech Green Brighter CS Tracer Unit M14 CCW PTS Enhanced Polymer Magazine170rd Airsoft AEG Short (EPM1-S) Black Lancer Tactical 1000D Nylon Heavy Duty Gun Bag - 39" HPA Description The JACK™ system was designed to answer the demand for an affordable, high performance HPA conversion for AEG's. The system is a drop-in cylinder replacement that is universally compatible with a wide range of gearbox versions that have center-line nozzles. Similar to its sister product, the F1, it replaces the original gearbox components with a programmable pneumatic system allowing for higher performance and greater reliability over a gear driven system. Although economically priced, JACK™ still retains the same performance and quality you have come to expect from PolarStar products. Specs Velocity: 500FPS w/ .20g @ 120psi. The Jack allows for easy velocity adjustment. Using a standard V2 as an example, velocity can be adjusted from below 100fps and up to approximately 500fps with a .20g BB. Longer barrels will increase the maximum FPS while shorter barrels will decrease it. ROF: 30RPS+ The maximum cyclic rate of the Jack is affected by several factors, however, 30 rounds per second is a conservative number. Most configurations will exceed this easily. Air Efficiency: 1200 shots from 13/3000 @ 1.5J (80PSI w/ .28g) The JACK is extrememly efficient. The patent pending desi

SS Airsoft Custom HPA Avalon - SandCat w/ PolarStar Jack price comparison: the lowest price is $1332.86 at SSairsoft, and the median across 1 tracked listing is $1332.86.

Compatible with: M14, PDW, HPA, AEG

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