{"product_id":"stalker-ultimate-srs-upgrade-kit-420mm","title":"Ultimate SRS Upgrade Kit (420mm Barrel 3.0–3.5 Joules)","description":"\u003cp\u003e\u003cstrong\u003eThe Ultimate Stalker Upgrade Kit to turn your Silverback SRS into a true sniper beast. This upgrade kit makes your SRS accurate, consistent, and silent! Load up your magazines and dominate the field like never before.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe package includes the following Stalker upgrades:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.skirmshop.nl\/en\/kraken-hopup-srs-ultimate-edition.html\" target=\"_blank\" rel=\"noopener\"\u003eStalker SRS Kraken Hop-Up Chamber - Ultimate Edition\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.skirmshop.nl\/en\/scorpion-piston-srs-ultimate-edition-1.html\" target=\"_blank\" rel=\"noopener\"\u003eStalker SRS Scorpion Piston - Ultimate Edition\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.skirmshop.nl\/en\/morpheus-dual-bore-hybrid-barrel.html\" target=\"_blank\" rel=\"noopener\"\u003eStalker Morpheus 420mm Inner Barrel\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.skirmshop.nl\/en\/teflon-fluted-cylinder-for-srs-a1-a2.html\" target=\"_blank\" rel=\"noopener\"\u003eStalker SRS Fluted Teflon Cylinder\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.skirmshop.nl\/nl\/official-logo-patch.html\"\u003eStalker Official Logo Patch\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe strongly believe that Rapax springs are the best springs on the market. The results achieved with these springs and the Stalker upgrades are outstanding.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.skirmshop.nl\/en\/rms-3-joule-spring.html\" target=\"_blank\" rel=\"noopener\"\u003eRapax RMS 3+ Spring\u003c\/a\u003e (includes tensioners to increase FPS\/Joule if needed.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Note: This upgrade discount is only available when all products are in stock. Click \"Add to Cart\" — if all products are visible, you can purchase this kit with the mentioned discount. If you see a blank page, it means one of the products is currently unavailable.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eProduct Descriptions:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eKraken Hop-Up Chamber\u003c\/em\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEasy setup for both experienced and new players (~2-minute bucking swap)\u003c\/li\u003e\n\u003cli\u003e100% self-alignment system for a perfectly straight setup\u003c\/li\u003e\n\u003cli\u003e100% straight \/ 100% seal patented Kraken bucking\u003c\/li\u003e\n\u003cli\u003eAdjustment wheel head cut-out for easy tuning\u003c\/li\u003e\n\u003cli\u003eO-ring guided adjustment wheel\u003c\/li\u003e\n\u003cli\u003eCustom-made steel hop arm screw\u003c\/li\u003e\n\u003cli\u003eLaser-engraved white lettering and text\u003c\/li\u003e\n\u003cli\u003eFront O-ring to prevent BBs from falling into the receiver\u003c\/li\u003e\n\u003cli\u003eModular chamber design compatible with most VSR buckings, bridged\/unbridged barrels, and nubs\u003c\/li\u003e\n\u003cli\u003eModular arm section compatible with S1, S2, and S3 arms\u003c\/li\u003e\n\u003cli\u003eV-groove island for upper outer barrel screw (SRS A1)\u003c\/li\u003e\n\u003cli\u003eV-groove for lower outer barrel screw (SRS A2)\u003c\/li\u003e\n\u003cli\u003eSide flat body cutouts for future Stalker products\u003c\/li\u003e\n\u003cli\u003eQuick setup for easy barrel or bucking changes and barrel cleaning\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eSRS Scorpion Piston\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe Stalker Scorpion piston features an extremely modular design developed from scratch. It offers all the options players could want for their SRS piston. This unique concept uses six weights that form the piston body itself. Because the piston is constructed from these weights, it can be extended with additional weights (short-stroke configuration), which reduces cylinder volume and joule output.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMorpheus 420mm Inner Barrel\u003cbr\u003e\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Morpheus Hybrid Barrel is made from highly durable SUS304 stainless steel and features a dual-bore tapered end crowning to enhance both range and accuracy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWe selected stronger, more durable SUS304 seamless steel to raise the performance standard. Most brands use SUS303 seamed steel because it is easier to machine. However, SUS303 stainless steel has reduced corrosion resistance due to its machinability-focused composition. The SUS304 steel we use is more difficult to machine but significantly more durable and offers superior corrosion resistance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFluted Teflon Cylinder\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis cylinder is a Teflon fluted version of a standard cylinder and gives your SRS A1 or A2 an aggressive look. The internal coating is applied using a cold treatment process, ensuring the cylinder maintains perfect straightness—unlike many heat-treated cylinders. In addition to enhanced aesthetics, the special inner coating improves energy transfer with the piston and may increase joule output when paired with a properly sized piston cup.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFully compatible with Silverback SRS A1 and A2 receivers\u003c\/li\u003e\n\u003cli\u003eThread compatible with both A1 and A2 bolt handles\u003c\/li\u003e\n\u003cli\u003eCompatible with aftermarket pistons\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eRapax 3J+ RMS Spring\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe Rapax Modular Spring (RMS) series is manufactured to the same high-quality standards as the Light Pull series. Built for durability and performance, it delivers an outstanding sniper experience. Compared to the Light Pull series, the RMS spring is significantly shorter, slightly harder to pull, and provides quieter shots. RMS springs are also electrically coated to prevent rust, ensuring smoother operation on the spring guide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eIf you have any issues or questions about this or other Stalker products, please visit our Stalker Owners Group on Facebook here: \u003ca href=\"https:\/\/www.facebook.com\/groups\/329589544772075\/\"\u003ehttps:\/\/www.facebook.com\/groups\/329589544772075\/\u003c\/a\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou can follow live updates, photos, and information on Instagram, Facebook, or YouTube:\u003cbr\u003e\u003cbr\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\u003e\u003cb\u003eFor more information about Stalker products, tech \u0026amp; crafting guides, please visit: \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":52552023081301,"sku":"SP-STAL-175","price":340.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/3607\/7909\/files\/srs-ult-kit-420-3j_f3450097-711f-4125-9198-7dd1e538703e.jpg?v=1771967652","url":"https:\/\/www.skirmshop.es\/en-us\/products\/stalker-ultimate-srs-upgrade-kit-420mm","provider":"Skirmshop Spain","version":"1.0","type":"link"}