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AVS™ Extendable StKSS™


Our STRUCTURAL KINETIC SUPPORT SYSTEM (StKSS)™ allows a wearer to selectively transfer some or all of the weight of their armor vest to their hips. EXTENDABLE StKSS™ allow the wearer’s shoulders and spinal column to be completely isolated from the weight being carried. Instead, the weight is transferred directly to the pelvis (hip bone) and legs. The effect is unmistakable, and the benefit is undeniable to those familiar with what wearing a >50 lbs. vest for months on end does to your lower back. Compatible with AVS™ HARNESS , AVS™ LOW PROFILE BELT , and LOW PROFILE BLAST BELT™ . Made in US from US materials.

  1. Extremely simple and lightweight
  2. Designed to reduce back fatigue
  3. Highly flexible and easy to use
  4. Very little impact on range of motion
  5. Doesn't limit the vest's emergency-release capability
  6. Adjusts on the fly for perfect fit
  1. 0.17 lbs. per piece (0.34 lbs. per pair)

In order to provide the best possible service to our customers, we ship all domestic purchases via UPS. Please note that while we do offer expedited service through UPS, in-stock orders are generally processed in 2-3 business days.
Items not in-stock at the time of order will automatically be put on backorder status and shipped when available. Orders will be partially shipped unless specified by the customer. The customer is responsible for all shipping charges.
We do ship to our valued customers at APO/FPO locations but do so only using USPS.


We will gladly accept any returns on the condition that the item includes all of the original packaging, instructions, receipt, return authorization, and has not been laundered. Returns will not be accepted on closeout items.
Items must be received within 60 days from date of purchase. It must be unused and undamaged. All returns will be carefully inspected before giving a refund, credit or exchange.
The customer is responsible for any and all shipping charges. Returns may be subject to a 10% restocking fee.

Contact us, or log in to your account to start a return: