{"product_id":"sig-sauer-mcx-rattler-lt-complete-upper-receiver-300-blackout-6-75-threaded-barrel-5-8x24-thread-pitch-fits-ar-15-lower-receivers-anodized-finish-black-includes-charging-handle-and-bolt-carrier-group-clutch-lok-tapered-qd-flash","title":"Sig Sauer MCX-Rattler LT |  Complete Upper Receiver |  300 Blackout |  6.75\" Threaded Barrel |  5\/8X24 Thread Pitch |  Fits AR-15 Lower Receivers |  Anodized Finish |  Black |  Includes Charging Handle and Bolt Carrier Group |  Clutch-Lok Tapered QD Flash","description":"The MCX-RATTLER LT offers a 6.75\"\" cold-hammer-forged barrel, compatibility with AR-style triggers, an adjustable gas system for suppressor optimization, a QD Clutchlok Muzzle Device, and an M4 adapter kit to convert any M4 lower to use the MCX platform's folding capability. The new MCX-RATTLER LT design is compatible with all MCX-SPEAR LT parts, so any barrel or handguard from the MCX-SPEAR LT can be interchanged, enabling easy caliber and length conversions. Advanced beyond any platform in its class, the MCX-RATTLER LT upper is the ultimate upgrade for your MCX or M4 lower.\n\nKEY FEATURES:\nAdapts with Any M4\/AR15 Spec Lower Assembly | Dual Rod Recoil Assembly Eliminates Buffer System | Adjustable Gas System | Quick Change Barrel Design | Ambidextrous Charging Handle with Gas Deflector | Tapered Bolt Design | Compatible with SLX\/SLH Suppressors","brand":"Sig Sauer","offers":[{"title":"Black \/ AR Rifles \/ Anodized","offer_id":50519102128342,"sku":"UAMCX-300B-6B-LT-BLK","price":1799.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0004\/0635\/5980\/files\/SGUAMCX-300B-6B-LT-BLK_1.jpg?v=1790085235","url":"https:\/\/www.atomicdefense.com\/products\/sig-sauer-mcx-rattler-lt-complete-upper-receiver-300-blackout-6-75-threaded-barrel-5-8x24-thread-pitch-fits-ar-15-lower-receivers-anodized-finish-black-includes-charging-handle-and-bolt-carrier-group-clutch-lok-tapered-qd-flash","provider":"Atomic Defense","version":"1.0","type":"link"}