{"title":"Best Sellers","description":"","products":[{"product_id":"vprs-47","title":"VPRS-47","description":"\u003cdiv class=\"OutlineElement Ltr SCXW199026459 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW199026459 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW199026459 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW199026459 BCX0\"\u003eModern Energy Control for the AK Platform\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW199026459 BCX0\" data-ccp-props=\"{}\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW199026459 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW199026459 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW199026459 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW199026459 BCX0\"\u003eThe VPRS-47™ brings progressive spring engineering to the AK operating system. Designed for 7.62×39 and compatible AK-pattern rifles, it replaces constant-rate recoil springs with a calibrated multi-stage variable pitch architecture.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW199026459 BCX0\" data-ccp-props=\"{}\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW199026459 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW199026459 BCX0\"\u003e\u003cspan data-contrast=\"auto\" lang=\"EN-US\" class=\"TextRun SCXW199026459 BCX0\"\u003e\u003cspan class=\"NormalTextRun SCXW199026459 BCX0\"\u003eThe AK platform is known for reliability — but factory recoil springs rely on linear resistance. The VPRS-47 introduces controlled rate progression to better manage bolt carrier velocity throughout the full stroke.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW199026459 BCX0\" data-ccp-props=\"{}\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW199026459 BCX0\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW199026459 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW199026459 BCX0\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Neptune Defense","offers":[{"title":"Light","offer_id":51813355127072,"sku":null,"price":29.99,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":51813355159840,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false},{"title":"Heavy","offer_id":51813355192608,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/8436\/5600\/files\/16A4FB64-41F7-4276-8DCA-8AA54AFBE6F1.png?v=1771705125"},{"product_id":"vprs-15","title":"VPRS-15","description":"\u003cdiv class=\"OutlineElement Ltr SCXW122746356 BCX0\"\u003e\n\u003cp\u003eThe VPRS-15 is a precision-engineered variable pitch recoil spring system designed for shooters who demand measurable performance. Built to optimize energy distribution throughout the cycling process, the VPRS-15 delivers smoother operation, reduced felt recoil, and improved platform stability under rapid fire.\u003c\/p\u003e\n\u003cp\u003eUnlike standard linear springs, the variable pitch design manages bolt carrier velocity more efficiently, helping reduce excess wear while maintaining reliability across a wide range of ammunition types. The result is flatter shooting, faster follow-up shots, and a more controlled rifle — without compromising durability.\u003c\/p\u003e\n\u003cp\u003eManufactured to tight tolerances using premium 302 Stainless Steel, the VPRS-15 is built for hard use in duty, competition, and serious training environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Neptune Defense","offers":[{"title":"Medium","offer_id":51264158662944,"sku":null,"price":19.99,"currency_code":"USD","in_stock":true},{"title":"Light","offer_id":51813250728224,"sku":null,"price":19.99,"currency_code":"USD","in_stock":true},{"title":"Heavy","offer_id":51813259411744,"sku":null,"price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/8436\/5600\/files\/VPRS-15Productphoto.jpg?v=1771408063"},{"product_id":"vprs-10","title":"VPRS-10","description":"\u003cdiv class=\"OutlineElement Ltr SCXW173504951 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW173504951 BCX0\"\u003e\u003cspan class=\"TextRun SCXW173504951 BCX0\" lang=\"EN-US\" data-contrast=\"auto\"\u003e\u003cspan class=\"NormalTextRun SCXW173504951 BCX0\"\u003eThe VPRS-10™ is a precision-engineered variable pitch recoil spring designed specifically for large-frame AR platforms. Where standard .308 springs rely on linear resistance, the VPRS-10 manages energy dynamically through a progressive\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun ContextualSpellingAndGrammarErrorV2Themed SCXW173504951 BCX0\"\u003eload\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW173504951 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003earchitecture.\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-ccp-props=\"{}\" class=\"EOP SCXW173504951 BCX0\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW173504951 BCX0\"\u003e\n\u003cp class=\"Paragraph SCXW173504951 BCX0\"\u003e\u003cspan class=\"TextRun SCXW173504951 BCX0\" lang=\"EN-US\" data-contrast=\"auto\"\u003e\u003cspan class=\"NormalTextRun SCXW173504951 BCX0\"\u003eLarge-frame rifles generate greater reciprocating mass and higher impulse forces. The VPRS-10 is built to regulate that mass — not just resist it.\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-ccp-props=\"{}\" class=\"EOP SCXW173504951 BCX0\"\u003e \u003c\/span\u003e\u003cspan class=\"TextRun SCXW173504951 BCX0\" lang=\"EN-US\" data-contrast=\"auto\"\u003e\u003cspan class=\"NormalTextRun SCXW173504951 BCX0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"OutlineElement Ltr SCXW173504951 BCX0\"\u003e\u003c\/div\u003e","brand":"Neptune Defense","offers":[{"title":"Light","offer_id":51813347557664,"sku":null,"price":29.99,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":51813347590432,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false},{"title":"Heavy","offer_id":51813347623200,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/8436\/5600\/files\/VPRS-10ProductPicture.png?v=1771408026"},{"product_id":"vprs-15-a5","title":"VPRS-15-A5","description":"\u003cp\u003eThe VPRS-15A5 is a precision-engineered variable pitch recoil spring system designed specifically for A5-length buffer systems and shooters who demand measurable performance.\u003c\/p\u003e\n\u003cp\u003eUnlike standard linear springs, the variable-pitch design manages bolt carrier velocity more efficiently, helping reduce excessive wear while maintaining reliability across a wide range of ammunition types.\u003c\/p\u003e\n\u003cp\u003eThe result is flatter shooting, faster follow-up shots, and a more controlled rifle — without compromising durability. Manufactured to tight tolerances using premium 302 Stainless Steel, the VPRS-15-A5 is built for hard use in duty, competition, and serious training environments.\u003c\/p\u003e","brand":"Neptune Defense","offers":[{"title":"Light","offer_id":51813335269664,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false},{"title":"Medium","offer_id":51813335302432,"sku":null,"price":29.99,"currency_code":"USD","in_stock":true},{"title":"Heavy","offer_id":51813335335200,"sku":null,"price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/8436\/5600\/files\/VPRS-15Productphoto.jpg?v=1771408063"}],"url":"https:\/\/neptune-defense.com\/collections\/best-sellers.oembed","provider":"Neptune Defense","version":"1.0","type":"link"}