{"product_id":"sightmark-sm39021-boresight-red-laser-22-lr-brass-chamber-mount","title":"Sightmark SM39021 Boresight Red Laser 22 LR Brass Chamber-Mount","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eSightmark SM39021 Boresight\u003c\/span\u003e\u003c\/strong\u003e is a chamber-mounted \u003cstrong\u003ered laser\u003c\/strong\u003e \u003cstrong\u003eboresighter\u003c\/strong\u003e purpose-built for \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e.22 LR\u003c\/span\u003e\u003c\/strong\u003e rimfire rifles and pistols. Machined from \u003cstrong\u003ebrass\u003c\/strong\u003e to match the dimensions of a standard .22 LR cartridge, the unit drops into the chamber just like a live round and projects a red laser dot downrange so shooters can quickly align a scope, red dot, or iron sights without burning through a box of ammunition. It is an ideal zeroing tool for \u003cstrong\u003ehunters\u003c\/strong\u003e, \u003cstrong\u003ecompetitive shooters\u003c\/strong\u003e, and \u003cstrong\u003elaw enforcement\u003c\/strong\u003e who need fast, repeatable optic alignment.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003ePower is supplied by an \u003cstrong\u003eexternal battery pack\u003c\/strong\u003e using \u003cstrong\u003etwo AAA batteries\u003c\/strong\u003e (included), keeping the laser body compact and lightweight while delivering a consistent aiming reference. The boresighter ships with a \u003cstrong\u003ecarrying case\u003c\/strong\u003e to protect the brass body and accessories during transport and storage, making it easy to toss into a range bag or gunsmith's kit.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eSetup is straightforward: clear the firearm, insert the SM39021 into the chamber, switch on the laser, and adjust your optic until the reticle and laser dot are co-aligned. This dramatically \u003cstrong\u003ereduces wasted cartridges and shells\u003c\/strong\u003e during the sighting-in process. \u003cstrong\u003eBrand:\u003c\/strong\u003e Sightmark. \u003cstrong\u003eModel:\u003c\/strong\u003e Boresight. \u003cstrong\u003eMPN:\u003c\/strong\u003e SM39021. \u003cstrong\u003eUPC:\u003c\/strong\u003e 810119014528.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eYour purchase includes:\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eSightmark SM39021 Red Laser Boresight for 22 LR (brass body)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eExternal battery pack with 2 AAA batteries\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eCarrying case\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eInstructions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sightmark","offers":[{"title":"Default Title","offer_id":55100331524418,"sku":"8156","price":45.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_a4a325b5-f9fa-4121-bbb4-7381891535fb.png?v=1784790058","url":"https:\/\/centerfiresystems.com\/products\/sightmark-sm39021-boresight-red-laser-22-lr-brass-chamber-mount","provider":"Centerfire Systems","version":"1.0","type":"link"}