{"product_id":"daniel-defense-m4a1-upper-complete-upper-receiver-5-56-nato-14-5-pinned-16-oal-daniel-defense-m4a1-fsp-rail-interface-system-rail-carbine-length-gas-system-surefire-sf3p-flash-hider-m16-profile-bolt-carrier-group-anodized-fi","title":"Daniel Defense M4A1 |  Upper |  Complete Upper Receiver |  5.56 NATO |  14.5\" Pinned (16\" OAL) |  Daniel Defense M4A1 FSP Rail Interface System Rail |  Carbine-Length Gas System |  Surefire SF3P Flash Hider |  M16 Profile Bolt Carrier Group |  Anodized Fi","description":"This Daniel Defense M4A1 FSP AR15 style Upper Receiver Group was built for customers wanting a firearm inspired by USSOCOM SOPMOD Block II. This upper features the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth, a 14.5\"\" M4 profile barrel, Mil-Spec F-Marked front sight base, Surefire SF3P flash hider \/ suppressor adapter, A1.5 Fixed Rear Sight, M16 profile full auto bolt carrier group, and Rail Mounted QD Swivel Attachment Point with QD swivel.\n\nKEY FEATURES:\nUPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum | BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 14.5\" M4 Profile, Chrome Lined, Mil-Spec Phosphate Coated | GAS SYSTEM: Mil-Spec F-Marked Front Sight Base, Carbine Length, Direct Impingement | MUZZLE DEVICE: Surefire SF3P Flash Hider \/ Suppressor Adapter, Black Ionbond DLC Coating, Pinned and Welded to Barrel | BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key | SIGHTS: A1.5 Fixed Rear Sight, 6061-T6 Aluminum, Type III Hard Coat Anodized | HANDGUARD: Daniel Defense M4A1 FSP Rail Interface System (RIS) II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized FDE","brand":"WH3","offers":[{"title":"Flat Dark Earth \/ Anodized \/ 14.5\" Pinned (16\" OAL)","offer_id":50532270833878,"sku":"23-004-09376","price":1629.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0004\/0635\/5980\/files\/DD23-004-09376_1.jpg?v=1790250273","url":"https:\/\/www.atomicdefense.com\/products\/daniel-defense-m4a1-upper-complete-upper-receiver-5-56-nato-14-5-pinned-16-oal-daniel-defense-m4a1-fsp-rail-interface-system-rail-carbine-length-gas-system-surefire-sf3p-flash-hider-m16-profile-bolt-carrier-group-anodized-fi","provider":"Atomic Defense","version":"1.0","type":"link"}