Pleasde note this is a Back Order - these normally have a 15-20 day lead time 


SAP PISTON available as an extra 


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Kit contents:


  • Spring guide with built in bearing
  • Spring
  • Piston with teflon guide ring
  • Bolt (Laser engraved)
  • Bolt Handle
  • Dual bore barrel


This is the Longbow & IHFY version of the SRS kit from Edgi Custom Works.


This version of the kit is only available to the UK market exclusively from Longbow & IHFY.


Both companies spent numerous weeks tweaking & adapting the current standard kit with Edgi Custom Works to bring you the best in quality & performance. Each version of the kit goes through the following process upon production... 8 hrs on lapping the barrel 4 hours polishing 2 hours straightening 4 hours poilishing the cylinder to a smoother action.


The Cylinder is designed to have just 2 contact points with the receiver using Heat treated Stainless Steel for extra strength and colour. Stainless Steel spring guide with bearing. The heavier piston makes a better sealing from a polyurethane cap type head creating a perfect seal and a zero bounce.


Standard SRS kits ship with a 6.01mm tight bore barrel however our version of the kit comes complete with a new Dual bore barrel design made especially for the SRS. The Dual bore barrel system will be available in four barrel lengths all with 6.00-6.05mm ID.


This design has proven through recorded testing to give a increase in range & accuracy to over 100m virtually flat using the SRS 22'' version at 500fps with .45 Longbow bb's. FPS will of course depend on your countries legal threshold. All testing was done in the UK at 500FPS. Please note these are made to order so any cancelled order will be subject to a 20% restocking fee

EdGI SRS Upgrade kit (Pull Bolt) - Exclusive Dual Bore Barrel