{"product_id":"spearhead-tuner-muzzle-brake-combo-4-port","title":"Spearhead Machine Tuner Muzzle Brake Combo 4 Port","description":"\u003cp\u003eA self-timing 4-port brake and a heavy barrel tuner in one unit. The tuner finds the node within a revolution or two on even heavy match contours, and the extra weight at the muzzle balances PRS\/NRL rifles.\u003c\/p\u003e\u003ch3\u003eFitment \u0026amp; notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrake + heavy barrel tuner in one; finds the node within a revolution or two\u003c\/li\u003e\n\u003cli\u003eAdds balance weight at the muzzle for PRS\/NRL rifles\u003c\/li\u003e\n\u003cli\u003eShips with the double-threaded tuner locking collar only (no standard brake collar)\u003c\/li\u003e\n\u003cli\u003eGrease\/anti-seize threads on stainless; oil black nitride periodically\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable class=\"spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003e4-port self-timing brake + barrel tuner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003e1.0\" brake body, 1.125\" locking collar, 1.6\" tuner body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e2.840\" forward of the muzzle shoulder, 1.540\" behind it\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBack taper\u003c\/th\u003e\n\u003ctd\u003eVaries by option (see below)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarrel fit (tuner)\u003c\/th\u003e\n\u003ctd\u003eBarrel up to 1.070\" diameter, 1.5\" behind the muzzle shoulder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e352 g \/ 12.42 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e17-4 PH stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eSelf-timing locking collar, tensioning key included; no tools needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLeveling\u003c\/th\u003e\n\u003ctd\u003eLeveling flat on the bottom for precise leveling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eAvailable options\u003c\/h3\u003e\u003ctable class=\"spec-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003cth\u003eBore (Caliber)\u003c\/th\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.223\/6mm\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e6.5mm\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.30\/7mm\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.338\u003c\/td\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.223\/6mm\u003c\/td\u003e\n\u003ctd\u003eBlack Nitride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e6.5mm\u003c\/td\u003e\n\u003ctd\u003eBlack Nitride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.30\/7mm\u003c\/td\u003e\n\u003ctd\u003eBlack Nitride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\/8-24\u003c\/td\u003e\n\u003ctd\u003e.338\u003c\/td\u003e\n\u003ctd\u003eBlack Nitride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eChoose a bore that matches or exceeds your caliber.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eMake sure the firearm is completely unloaded.\u003c\/li\u003e\n\u003cli\u003eConfirm the brake bore matches or exceeds your caliber.\u003c\/li\u003e\n\u003cli\u003eRemove the factory thread protector or muzzle device, and any O-ring on the threads.\u003c\/li\u003e\n\u003cli\u003eThread on the locking collar and brake, time the brake by hand, then lock it with the included tensioning key.\u003c\/li\u003e\n\u003cli\u003eRemove the key after tightening.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003ePrecision machined by Spearhead Machine in Canada.\u003c\/p\u003e","brand":"B\u0026B Firearms","offers":[{"title":"5\/8-24 \/ .223\/6mm \/ Stainless","offer_id":67387982577954,"sku":"SPH-2273-5-8-24-223-6MM-STAINLESS","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ 6.5mm \/ Stainless","offer_id":67387982610722,"sku":"SPH-2273-5-8-24-6-5MM-STAINLESS","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ .30\/7mm \/ Stainless","offer_id":67387982643490,"sku":"SPH-2273-5-8-24-30-7MM-STAINLESS","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ .338 \/ Stainless","offer_id":67387982676258,"sku":"SPH-2273-5-8-24-338-STAINLESS","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ .223\/6mm \/ Black Nitride","offer_id":67387982709026,"sku":"SPH-2273-5-8-24-223-6MM-BLACK-NITRIDE","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ 6.5mm \/ Black Nitride","offer_id":67387982741794,"sku":"SPH-2273-5-8-24-6-5MM-BLACK-NITRIDE","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ .30\/7mm \/ Black Nitride","offer_id":67387982774562,"sku":"SPH-2273-5-8-24-30-7MM-BLACK-NITRIDE","price":219.54,"currency_code":"USD","in_stock":true},{"title":"5\/8-24 \/ .338 \/ Black Nitride","offer_id":67387982807330,"sku":"SPH-2273-5-8-24-338-BLACK-NITRIDE","price":219.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/0896\/1058\/files\/TB01.jpg?v=1790456849","url":"https:\/\/bnbfirearms.com\/products\/spearhead-tuner-muzzle-brake-combo-4-port","provider":"B\u0026B Firearms","version":"1.0","type":"link"}