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Seekins Precision DMR .223/5.56 18" Bbl Complete Upper Receiver 0011100107-F

SKU 0011100107-F-SEK

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Built from the ground up for extreme accuracy and durability under real-world stress, the iRMT-3 Upper Receiver allows your barrel to be a true free float system. With the handguard attaching directly to the upper receiver, not the barrel nut, this receiver allows for a rigid monolithic style platform. This design is ideal for competition or duty use, and allows you to maintain your accuracy from any position. The handguard itself is the SP3R, which features a flatter bottom, numerous M-LOK attachment points, and a full length picatinny rail.

Other features of the iRMT-3 upper include the exclusive low profile gas block, which allows you to fine-tune your rifle's gas system for smoother cycling and operation when using different ammunition types or when using a silencer.


  • Caliber: .223 Wylde (5.56)
  • Barrel: 16" / 18" 1:8 Twist 5R 416 stainless steel
  • Receiver: iRMT-3 7075-T6 billet
  • Handguard: 15" SP3R Handguard
  • Gas Block: Seekins Low Profile Adjustable Gas Block
  • Charging Handle: Seekins DNA
  • BCG: Seekins Precision BCG
  • Coating: Anodized


  • Caliber:.223/5.56
  • Rifle Barrel Length:18 inches
  • Rifle Barrel Twist:1:8"
  • Iron Sights No
  • Caliber or Gauge:.223 Wylde
  • Item ConditionNew
  • Product TypeUpper Receiver
  • UPC811452029811
  • MPN0011100107-F

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