{"product_id":"fps-soft-air-pistone-zero-shock-alleggerito-full-metal-rack14-denti-pm03-bianco","title":"FPS SOFT AIR piston zero shock lightened full metal rack 14 teeth","description":"Fps is proud to present the first lightweight piston with a technopolymer body and all-metal teeth, equipped with the ZERO-SHOCK damping system, 100% Made in Italy.\u003cbr\u003e\u003cbr\u003eThis patented Fps system reduces the stresses that the rack transmits to the piston body, making the assembly enormously more resistant and reliable than a normal piston.\u003cbr\u003e\u003cbr\u003eFor the body material, a technopolymer with added elastomer was developed, which provides high mechanical performance and a very low coefficient of friction.\u003cbr\u003e\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 solid machining.\u003cbr\u003eThe rack comes with the second tooth missing and the third already lowered by 0.3 millimeters, as this configuration prepares the piston itself 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 guide rails are designed to minimize friction and retain lubricant for a long period of time.\u003cbr\u003eThe rack seat is off-center to facilitate the coupling 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 the rack from contacting 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":62042164461898,"sku":"PM03BIANCO-UNI","price":11.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1043\/8921\/4538\/files\/CC---FPS_20SOFT_20AIR---PM03BIANCO.jpg?v=1784833987","url":"https:\/\/www.military-surplus.it\/en\/products\/fps-soft-air-pistone-zero-shock-alleggerito-full-metal-rack14-denti-pm03-bianco","provider":" MILITARYSURPLUS","version":"1.0","type":"link"}