{"product_id":"stalker-tac41-piston-scorpion-upgrade","title":"Scorpion Piston - TAC41 + Spring Guide","description":"\u003cp\u003e\u003cstrong\u003eThe new Stalker Scorpion piston for the TAC41!\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 TAC41\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\u003eOptional short-stroke setup for your TAC41 for faster reloads and a shorter bolt pull\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThe piston includes 2 adjustable airbrakes for optimal fine-tuning based on 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 upgrades).\u003c\/li\u003e\n\u003cli\u003e1 long 3.80 mm airbrake (optimal for 2J~ or lower upgrades).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe included airbrakes are designed to work with the standard TAC41 cylinder head. If you are using the GBB hop unit or the TAC41 Kraken, you must purchase the thicker airbrakes.\u003c\/p\u003e\n\u003cp\u003eA High Joule cup (shiny) 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 achieves approximately 2.2–2.3~ joules in a TAC41 with a Stalker TAC41 cylinder and a 420 mm inner barrel. The original cylinder will produce lower 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\n\u003cstrong\u003eFor 2.3J setups, we recommend starting with the short airbrake fully unscrewed.\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eFor 2.8J+ setups, we recommend starting with the short airbrake fully screwed in.\u003c\/strong\u003e\n\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\u003eMore joules = shorter airbrake\u003c\/li\u003e\n\u003cli\u003eLess joules = longer airbrake\u003c\/li\u003e\n\u003cli\u003eChoose your airbrake and start low, then increase (unscrew) gradually until the setup is quiet.\u003c\/li\u003e\n\u003cli\u003eWhen you begin to lose 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\u003c\/ul\u003e\n\u003cp\u003eProper setups require adjustable airbrakes because too many parts in your rifle can change the piston acceleration speed. Piston weight, spring power, bucking hardness, barrel length, 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 spring guide (with engraved Stalker logo)\u003c\/li\u003e\n\u003cli\u003e1x High Joule piston head (shiny)\u003cbr\u003e\n\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 and end cap made of stainless steel (rainbow finish)\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 to place between weights or the head to prevent weights from loosening\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 where 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 reduces your cylinder volume and joule output, but shortens the bolt pull of your TAC41 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 TAC41.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 black anodized aluminum body weights\u003c\/strong\u003e, each piece weighs: 3 grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 polished stainless steel body weights\u003c\/strong\u003e, each piece weighs: 11 grams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn addition, the piston also includes 2 head weight versions.\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 configurations\u003c\/strong\u003e:\u003cbr\u003e\u003cem\u003e(The fifth stainless steel mid-section weight is sold separately if you wish to use full heavy steel configurations)\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTAC41 Scorpion 62g (1 aluminum head, 5 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 76g (1 aluminum head, 1 steel mid-section, 4 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 80g (1 steel head, 5 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 89g (1 aluminum head, 2 steel mid-sections, 3 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 93g (1 steel head, 1 steel mid-section, 4 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 102g (1 aluminum head, 3 steel mid-sections, 2 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 107g (1 steel head, 2 steel mid-sections, 3 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 115g (1 aluminum head, 4 steel mid-sections, 1 aluminum mid-section)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 119g (1 steel head, 3 steel mid-sections, 2 aluminum mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 128g (1 aluminum head, 5 steel mid-sections)\u003c\/li\u003e\n\u003cli\u003eTAC41 Scorpion 133g (1 steel head, 4 steel mid-sections, 1 aluminum mid-section)\u003c\/li\u003e\n\u003cli\u003eTAC41 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 cup against the piston head to keep them in place after adjustment. The adjustable airbrake is designed to control piston speed at the end of its stroke, reduce cylinder air release time, and minimize piston impact noise when it hits the head. A Sorbo pad on the head can still be used with this piston.\u003c\/p\u003e\n\u003cp\u003eBasically, whether you prefer a plug-and-play piston or you are an expert fine-tuning piston weights and airbrakes for maximum performance, the Stalker Scorpion is your best friend.\u003c\/p\u003e\n\u003cp\u003eIf you have any issues or questions about this or other Stalker products, visit our Stalker owners group on Facebook here:\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: https:\/\/www.facebook.com\/StalkerAirsoftDesigns\/\u003cbr\u003eInstagram: https:\/\/www.instagram.com\/stalkerairsoftdesigns\/\u003cbr\u003eYoutube: https:\/\/www.youtube.com\/channel\/UCWsBiSHlu-lbcnGQWAkeJWQ\u003c\/p\u003e\n\u003cp\u003eFor more information about Stalker products, tech guides, and builds, visit: www.stalkerairsoft.com\u003c\/p\u003e","brand":"STALKER","offers":[{"title":"Default Title","offer_id":52551007797589,"sku":"SP-STAL-43-1.1","price":137.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/3607\/7909\/files\/image_a4511ffb-0d14-4ee5-9c9e-aad1fe75a019.jpg?v=1771970459","url":"https:\/\/www.skirmshop.es\/en-ca\/products\/stalker-tac41-piston-scorpion-upgrade","provider":"Skirmshop Spain","version":"1.0","type":"link"}