{"product_id":"aac-51t-pingless-fh-1-2x28-13-7-pwb","title":"AAC 51T Pingless Flash Hider 1\/2x28 for 13.7\" Pinned \u0026 Welded Barrels – AR-15 5.56\/.223","description":"\u003cp\u003eThe AAC 51T Pingless Flash Hider is a three-prong suppressor mount and flash hider designed for 13.7-inch barrels requiring a pinned and welded muzzle device to meet the 16-inch legal minimum barrel length. The pingless design eliminates the characteristic ringing sound found in standard birdcage flash hiders while providing effective flash suppression. This device serves as both a standalone flash hider and a quick-detach mount for AAC 51T-compatible suppressors.\u003c\/p\u003e\u003cp\u003eMachined from heat-treated steel with a black oxide finish, this flash hider features 1\/2x28 threads standard for AR-15 platform rifles in 5.56 NATO and .223 Remington. The extended length is specifically engineered to bring a 13.7-inch barrel to the required 16-inch overall length when permanently attached. Installation requires professional pinning and welding by a qualified gunsmith to ensure compliance with NFA regulations. Once installed, removal requires cutting and is considered a permanent modification.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Flash Hider \/ Suppressor Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO \/ .223 Remington\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 1\/2x28\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 Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuppressor Compatibility:\u003c\/strong\u003e AAC 51T QD Suppressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended Barrel Length:\u003c\/strong\u003e 13.7 inches (for pin and weld to 16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 Platform (5.56\/.223)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Advanced Armament Corp","offers":[{"title":"Default Title","offer_id":47943429062911,"sku":"AACO65035","price":105.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/5505795.jpg?v=1766573501","url":"https:\/\/doublestackstore.com\/products\/aac-51t-pingless-fh-1-2x28-13-7-pwb","provider":"Double Stack Store","version":"1.0","type":"link"}