{"product_id":"fps-soft-air-pistone-zero-shock-alleggerito-in-tecnopolimero-caricato-fibra-di-carbonio-full-metal-rack-14-denti-fps-pm03cf-grigio","title":"FPS SOFT AIR zero-shock lightweight carbon fiber reinforced technopolymer piston full metal rack 14 teeth fps","description":"Fps is proud to present the first lightweight piston with a carbon fiber-reinforced technopolymer body and a full metal rack, featuring the patented ZERO-SHOCK damping system \u003cu\u003e 100% Made in Italy\u003c\/u\u003e. \u003cbr\u003e\u003cbr\u003eThis patented system by Fps reduces the stress transmitted by the rack to the piston body, making the assembly enormously more resistant and reliable than a normal piston. For the body material, a technopolymer reinforced with carbon fiber and a small percentage of elastomer was developed, providing high mechanical performance and a very low friction coefficient.\u003cbr\u003eThe rack was manufactured using MIM (Metal Injection Molding) technology, as this production process guarantees dimensional precision and robustness practically equal to those of machining from solid.\u003cbr\u003eThe rack comes with the second tooth missing and the third already lowered by 0.3 millimeters. This configuration prepares the piston for a correct angle of engagement (AOE) and makes it suitable for high rates of fire.\u003cbr\u003eThe type of metal injected is SAE 4650, surface treated with HRC38-42° hardening, which is currently considered the best material on the market for this type of use.\u003cbr\u003eThe sliding guides are designed to minimize friction and retain lubricant for a long period of time.\u003cbr\u003eThe rack seat is off-center to facilitate the meshing between the piston teeth and the sector gear teeth.\u003cbr\u003eLongitudinal reinforcements on the sides of the teeth increase the piston's robustness and prevent contact between the rack and the inner wall of the cylinder.\u003cbr\u003eSpecial ribs reduce the contact surface between the spring and the inner part of the piston body, consequently reducing friction between metal and technopolymer during contraction and extension due to the firing cycle.\u003cbr\u003e\u003cbr\u003e100% MADE IN ITALY\u003cbr\u003e100% MARUI COMPATIBLE\u003cbr\u003e","brand":"FPS SOFT AIR","offers":[{"title":"UN","offer_id":62047156928842,"sku":"PM03CFGRIGIO-UNI","price":18.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1043\/8921\/4538\/files\/image_2de9c6d2-f807-4936-8ff4-6c773128f019.png?v=1780931396","url":"https:\/\/www.military-surplus.it\/en\/products\/fps-soft-air-pistone-zero-shock-alleggerito-in-tecnopolimero-caricato-fibra-di-carbonio-full-metal-rack-14-denti-fps-pm03cf-grigio","provider":" MILITARYSURPLUS","version":"1.0","type":"link"}