I have had the pleasure of owning the Chameleon SAP Piston for the SRS, Tac-41, VSR and SSG24.
All of these come in a well labelled box. The difference between a normal SAP Piston and the Chameleon is the eye catching colours of the sleeve which are a limited edition.
They come with 3 different weight choices, a spring guide and o rings. The weights consist of a 120g, 140g or 150g for SRS. Another great feature of this product is the adjustable air-break so if your SRS is slightly too 'hot' at chrono or not quite on the limit, it's so simple to adjust to help your sniper achieve maximum potential with your sites limits
6 benefits I personally find by using the SAP Piston are:
- It is very quiet. The cup design of the piston guarantees a good air seal and creates a softer impact which results in less noise coming out of the cylinder.
- The quantity of weights which are available to add on to increase joules for heavier bb use.
- A retractable air-break for power adjustments if the rifle shoots above the limit.
- The piston absorbs the shock which lessens the vibration which then results in a more accurate and flatter bb flight.
- In addition, it has a self centring head for maximum seal and it doesn't require specific types of lubricants.
- The spring guide sits tightly in the cylinders reducing any vibration.
The only negative I believe there is to the piston is the requirement for maintenance in terms of lubricating the cup. This is not much of a bother for the SRS or Tac-41 platform however, becomes more time consuming on the VSR and SSG24.
With all points considered, I'd give this product a 9/10.
(Disclaimer - This is my own personal opinion I have made after using this product myself)