{"title":"SRS Pistons","description":null,"products":[{"product_id":"stalker-scorpion-srs-piston","title":"Scorpion Piston - SRS + Spring Guide","description":"\u003cp\u003e\u003cstrong\u003eThe new Stalker Scorpion piston for the SRS!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModular piston with adjustable weight (from ~65 to 148 grams)\u003c\/li\u003e\n\u003cli\u003eSilences your SRS\u003c\/li\u003e\n\u003cli\u003eIncreases joule\/FPS consistency\u003c\/li\u003e\n\u003cli\u003eAdjustable airbrakes for optimal fine-tuning\u003c\/li\u003e\n\u003cli\u003eSRS short-stroke option for faster reloads and shorter bolt pull.\u003c\/li\u003e\n\u003cli\u003eWorks with Open Piston Sear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe piston includes 2 adjustable airbrakes for optimal fine-tuning according to your setup.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 short 3.80 mm airbrake (optimal for 2J and 3J~ or higher).\u003c\/li\u003e\n\u003cli\u003e1 long 3.80 mm airbrake (optimal for 2J~ or lower).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA High Joule (shiny) piston head is included for higher joule output and a lighter bolt pull.\u003cbr\u003eUse lubricant for perfect results; we recommend motor oil, silicone grease, or similar. As a reference, a Rapax Lightpull Blue 2J+ spring delivers 2.2–2.3~ joules in an SRS with a Stalker SRS cylinder and a 420 mm inner barrel. The original cylinder will produce fewer joules. Results may vary depending on the cylinder used.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGolden installation rules\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eAlways apply a drop of oil or silicone grease to the edge of the head to achieve optimal joules.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 2.3J setups, we recommend starting with the short airbrake and fully unscrewing it.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 2.8J+ setups, we recommend starting with the short airbrake and fully screwing it in.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAlways set your hop-up correctly for your desired BB weight and adjust it to shoot straight.\u003c\/li\u003e\n\u003cli\u003eHigher joules = shorter airbrake\u003c\/li\u003e\n\u003cli\u003eLower joules = longer airbrake\u003c\/li\u003e\n\u003cli\u003eChoose your airbrake and start low, then increase (unscrew) gradually until the setup becomes quiet.\u003c\/li\u003e\n\u003cli\u003eWhen you begin losing joules, you know you are just past the perfect airbrake position; screw it back in slightly to regain joules and achieve the quietest setup.\u003c\/li\u003e\n\u003cli\u003eWorks best with the Stalker SRS cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGood setups require adjustable airbrakes because too many parts in your rifle can change the piston acceleration speed. Spring power, bucking hardness, barrel length, piston weight, etc. We also recommend purchasing some spring guide spacers to fine-tune piston weight and spring joules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded in this kit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x Stalker stainless steel Scorpion spring guide (with engraved Stalker logo)\u003c\/li\u003e\n\u003cli\u003e1x Dampening rubber to place inside the rear of the Stalker spring guide\u003c\/li\u003e\n\u003cli\u003e1x High Joule piston head (shiny)\u003c\/li\u003e\n\u003cli\u003e1x Extreme Silent Cup (matte finish)\u003c\/li\u003e\n\u003cli\u003e1x Aluminum piston head.\u003c\/li\u003e\n\u003cli\u003e1x Stainless steel piston head.\u003c\/li\u003e\n\u003cli\u003e5x Aluminum weights.\u003c\/li\u003e\n\u003cli\u003e4x Stainless steel weights.\u003c\/li\u003e\n\u003cli\u003eSear made of stainless steel (15 grams)\u003c\/li\u003e\n\u003cli\u003e2 Adjustable airbrakes (long and short)\u003c\/li\u003e\n\u003cli\u003e1x Nut to lock the airbrake setting\u003c\/li\u003e\n\u003cli\u003e10 O-rings for between the weights or stock to prevent the weights from loosening during play.\u003c\/li\u003e\n\u003cli\u003e2 spring guide O-rings for SRS A2 buttpad\u003c\/li\u003e\n\u003cli\u003eFront and rear POM guide rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Scorpion piston is a unique concept in which 6 weights form the actual body. Since the piston itself is made up of these weights, it is also possible to extend the piston with additional weights (short-stroke), which in turn reduces your cylinder volume and joule output, but makes cocking your SRS much shorter with each added weight—at the cost of joule output, which can be compensated with a stronger spring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe piston comes with 9 body weights that are interchangeable to perfectly configure your SRS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5 black anodized aluminum body weights, each piece weighs: 3 grams\u003c\/li\u003e\n\u003cli\u003e4 polished stainless steel body weights, each piece weighs: 11 grams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditionally, the piston also includes 2 head weight versions.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x Black anodized aluminum head weighing: 7 grams\u003c\/li\u003e\n\u003cli\u003e1x Polished stainless steel head weighing: 17 grams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eList of \u003cstrong\u003e6-piece\u003c\/strong\u003e configurations:\u003cbr\u003e\u003cem\u003e(The fifth stainless steel mid-section weight is sold separately if you wish to use the full heavy steel configurations)\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSRS Scorpion 62g (1 aluminum head, 5 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 76g (1 aluminum head, 1 steel mid section, 4 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 80g (1 steel head, 5 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 89g (1 aluminum head, 2 steel mid sections, 3 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 93g (1 steel head, 1 steel mid section, 4 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 102g (1 aluminum head, 3 steel mid sections, 2 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 107g (1 steel head, 2 steel mid sections, 3 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 115g (1 aluminum head, 4 steel mid sections, 1 aluminum mid section)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 119g (1 steel head, 3 steel mid sections, 2 aluminum mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 128g (1 aluminum head, 5 steel mid sections)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 133g (1 steel head, 4 steel mid sections, 1 aluminum mid section)\u003c\/li\u003e\n\u003cli\u003eSRS Scorpion 145g (1 steel head, 5 steel mid sections)\u003cbr\u003e\u003cem\u003eThis configuration requires a fifth stainless steel mid section, sold separately.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth airbrakes are secured with a nut under the piston head against the head to keep them in place after adjustment. The adjustable airbrake is designed to fine-tune piston speed at the end of its travel to reduce cylinder air release time and minimize piston impact noise when it hits the cylinder head. A sorbo pad in the stock can still be used with this piston.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBasically, whether you like a plug-and-play piston or you are an expert who enjoys fine-tuning piston weights and airbrakes for maximum performance, the Stalker Scorpion is your best friend.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIf you have any issues or questions about this or other Stalker products, visit our Stalker Owners Facebook group here:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ehttps:\/\/www.facebook.com\/groups\/329589544772075\/\u003c\/p\u003e\n\u003cp\u003eYou can follow all my live streams, photos, and updates on my Instagram, Facebook, or YouTube channels here:\u003c\/p\u003e\n\u003cp\u003eFacebook:\u003ca href=\"https:\/\/www.facebook.com\/StalkerAirsoftDesigns\/\" target=\"_blank\" rel=\"noreferrer noopener\"\u003ehttps:\/\/www.facebook.com\/StalkerAirsoftDesigns\/\u003c\/a\u003e\u003cbr\u003eInstagram: \u003ca href=\"https:\/\/www.instagram.com\/stalkerairsoftdesigns\/\" target=\"_blank\" rel=\"noreferrer noopener\"\u003ehttps:\/\/www.instagram.com\/stalkerairsoftdesigns\/\u003c\/a\u003e\u003cbr\u003eYoutube: \u003ca href=\"https:\/\/www.youtube.com\/channel\/UCWsBiSHlu-lbcnGQWAkeJWQ\" target=\"_blank\" rel=\"noopener\"\u003ehttps:\/\/www.youtube.com\/channel\/UCWsBiSHlu-lbcnGQWAkeJWQ\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eFor more information about Stalker products, tech and build guides, visit: \u003cb\u003e\u003ca href=\"http:\/\/www.stalkerairsoft.com\/\" target=\"_blank\" rel=\"noopener\"\u003ewww.stalkerairsoft.com\u003c\/a\u003e\u003c\/b\u003e\u003c\/p\u003e","brand":"STALKER","offers":[{"title":"Default Title","offer_id":52551021887829,"sku":"SP-STAL-43-1","price":99.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/3607\/7909\/files\/image_cb5f9f07-33c9-4d0f-8520-8a465cf12eff.jpg?v=1771970336"},{"product_id":"silverback-srs-piston-variable-mass","title":"Variable Mass Piston for SRS A1\/A2","description":"\u003cp\u003eSRS Variable Mass Piston\u003c\/p\u003e\n\u003cp\u003e- NBR piston cup\u003cbr\u003e- CNC AL 6061 T6 piston head\u003cbr\u003e- CNC AL 6061 T6 piston body\u003cbr\u003e- CNC steel piston end\u003cbr\u003e- CNC aluminum weights (4 pieces)\u003cbr\u003e- CNC steel weights (4 pieces)\u003cbr\u003e- PTFE grease\u003cbr\u003e- Tools\u003c\/p\u003e\n\u003cp\u003eThis specialized piston allows you to adjust your SRS’s output energy by tuning the piston mass from 40 to 137 grams across 15 different configurations.\u003c\/p\u003e\n\u003cp\u003ePlease follow the tutorial video below:\u003c\/p\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/Sf4Fv1X3gc0?feature=oembed\" width=\"648\" height=\"365\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003eRef: SBA-BPS-18\u003c\/p\u003e","brand":"Silverback","offers":[{"title":"Default Title","offer_id":52552527020373,"sku":"SP-SBA-BPS-18","price":60.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/3607\/7909\/files\/silverback-srs-variable-mass-piston-pull-bolt-1_1bfdcedb-0da7-47ba-b238-ace7daeb41a8.jpg?v=1771965653"}],"url":"https:\/\/www.skirmshop.es\/en-ca\/collections\/srs-pistons-bundle.oembed","provider":"Skirmshop Spain","version":"1.0","type":"link"}