{"product_id":"pws-mk116-mod-1-m-upper-16-1-blk","title":"PWS MK116 MOD 1-M Complete Upper Receiver 5.56 NATO – AR-15 Platform","description":"\u003cp\u003eThe PWS MK116 MOD 1-M is a complete 16.1-inch upper receiver chambered in 5.56 NATO, designed for direct installation on any mil-spec AR-15 lower receiver. This upper features the company's long-stroke piston system, which reduces fouling and heat transfer to the bolt carrier group compared to direct impingement systems. The MOD 1-M configuration includes a free-float M-LOK rail for accessory mounting and weight reduction.\u003c\/p\u003e\u003cp\u003eBuilt with a 4150 chrome moly vanadium steel barrel and finished in black, this upper comes fully assembled with bolt carrier group and charging handle. The long-stroke piston design requires no modification to standard AR-15 lowers and uses a proprietary FSC muzzle device. Installation requires no gunsmithing—simply pin to a mil-spec lower and perform a function check before use.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Complete upper with BCG and charging handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Lower:\u003c\/strong\u003e Mil-spec AR-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 16.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 4150 CMV steel barrel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt carrier group, charging handle, FSC muzzle device\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas System:\u003c\/strong\u003e Long-stroke piston\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Primary Weapons Systems","offers":[{"title":"Default Title","offer_id":47938844426495,"sku":"PWSMK1-M1U-223-16","price":1129.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/4889314.jpg?v=1766534707","url":"https:\/\/doublestackstore.com\/products\/pws-mk116-mod-1-m-upper-16-1-blk","provider":"Double Stack Store","version":"1.0","type":"link"}