{"id":3350,"date":"2026-05-19T10:40:42","date_gmt":"2026-05-19T10:40:42","guid":{"rendered":"https:\/\/mrr-rifles.com\/prodotto\/j-20-muzzle-brake-5-8-24-unf-thread\/"},"modified":"2026-07-15T15:34:48","modified_gmt":"2026-07-15T15:34:48","slug":"j-20-muzzle-brake-5-8-24-unf-thread","status":"publish","type":"product","link":"https:\/\/mrr-rifles.com\/en\/product\/j-20-muzzle-brake-5-8-24-unf-thread\/","title":{"rendered":"Jet Brake S Muzzle Brake \u2013 J20 \u2013 \u00d820 mm \u2013 5\/8&#8243;-24 UNF thread"},"content":{"rendered":"<p>Double-effect muzzle brake and compensator for Sabatti bolt-action rifles. A rifle&#8217;s recoil is essentially made up of two factors: the thrust of the gases expanding at the muzzle, and the conservation of momentum of the system formed by the rifle moving backwards and the bullet moving forward. Single-effect brakes (Boss-type or tactical brakes in general) only partially compensate for the first factor; the Jet Brake, by directing the gases at an angle towards the rear of the rifle, also acts on the second.<\/p>\n<p>The gas ports are the most delicate part of a muzzle brake: their shape and inclination are the result of a careful study of the fluid dynamics of expanding gases and of extensive testing, measuring both the recoil reduction and the influence on the rifle&#8217;s accuracy. The result is one of the most effective brakes in terms of recoil reduction, and among the least impactful on accuracy.<\/p>\n<p>Unlike other brakes that use lock nuts, spring washers or clamp-type locking systems for timing, the Jet Brake uses a completely new system with an internal threaded ring operated by an Allen key: the look of the brake stays clean, with a technological yet refined appearance.<\/p>\n<p><strong>This listing: version J20 \u2013 \u00d8 20 mm barrel \u2013 5\/8&#8243;-24 UNF muzzle thread.<\/strong><\/p>\n<p>Compatible with Sabatti rifles: new Rover, Saphire, SKL-20. Can also be fitted to rifles from other manufacturers, depending on barrel diameter and muzzle thread pitch: if in doubt, contact us to check compatibility.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MRR\/Sabatti double-effect muzzle brake and compensator. Gas ports engineered on the fluid dynamics of expanding gases: maximum recoil reduction, minimal influence on accuracy. Fixed via an internal threaded ring with Allen key. J20 \u2013 \u00d8 20 mm barrel \u2013 5\/8&#8243;-24 UNF muzzle thread.<\/p>\n","protected":false},"featured_media":1772,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[278],"product_tag":[299,347,354,339],"class_list":["post-3350","product","type-product","status-publish","has-post-thumbnail","product_cat-muzzle-brakes-en","product_tag-jet-brake","product_tag-rover-alaskan-en","product_tag-rover-varmint-en","product_tag-rover-varmint-syn-en","desktop-align-left","tablet-align-left","mobile-align-left","ast-product-gallery-layout-horizontal-slider","ast-product-gallery-with-no-image","ast-product-tabs-layout-horizontal","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Jet Brake S Muzzle Brake \u2013 J20 \u2013 \u00d820 mm \u2013 5\/8&quot;-24 UNF thread - MRR Rifles<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrr-rifles.com\/en\/product\/j-20-muzzle-brake-5-8-24-unf-thread\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jet Brake S Muzzle Brake \u2013 J20 \u2013 \u00d820 mm \u2013 5\/8&quot;-24 UNF thread - MRR Rifles\" \/>\n<meta property=\"og:description\" content=\"MRR\/Sabatti double-effect muzzle brake and compensator. 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