{"product_id":"yhm-nielsen-piston-m13-5-1lh-9mm-slv","title":"Yankee Hill Machine Nielsen Piston M13.5x1LH 9mm – Silver Finish","description":"\u003cp\u003eThe YHM Nielsen Piston converts fixed-mount suppressors into tilting-barrel compatible systems for 9mm pistols with M13.5x1LH threading. This spring-loaded booster assembly allows the barrel to unlock and cycle properly when suppressed, preventing short-stroking and function failures common with direct-thread cans on Browning-style actions.\u003c\/p\u003e\u003cp\u003ePrecision-machined from heat-treated steel with a corrosion-resistant silver finish. Installs between your suppressor mount and the pistol's threaded barrel. Compatible with YHM 9mm suppressors and other manufacturers using Nielsen-device specifications. Essential for reliable suppressed operation on tilting-barrel pistols including many Glock, Beretta, and SIG Sauer models. This is a legally transferable suppressor accessory; the suppressor itself requires ATF Form 4 approval.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Nielsen Device \/ Booster Piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 9mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch:\u003c\/strong\u003e M13.5x1LH (Left-Hand)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Heat-Treated Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e Tilting-barrel 9mm pistols with M13.5x1LH barrel threads\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yankee Hill Machine Co","offers":[{"title":"Default Title","offer_id":47943799308543,"sku":"YHM-2060-M","price":69.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2888891.jpg?v=1766601482","url":"https:\/\/doublestackstore.com\/products\/yhm-nielsen-piston-m13-5-1lh-9mm-slv","provider":"Double Stack Store","version":"1.0","type":"link"}