• -9%
    MSF 11.5” 5.56/.223 Pistol Build Kit
    MSF 11.5” 5.56/.223 Pistol Build Kit
    Caliber: 5.56/.223
    Barrel Size: 11.5"
    Original price was: $549.00.Current price is: $499.00.
  • -14%
    MSF 11.5” 5.56/.223 Pistol Upper Assembly
    MSF 11.5” 5.56/.223 Pistol Upper Assembly
    Style: Pistol
    Barrel Size: 11.5"
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 12.5” 5.56/.223 Pistol Build Kit
    MSF 12.5” 5.56/.223 Pistol Build Kit
    Caliber: 5.56/.223
    Barrel Size: 12.5"
    Original price was: $549.00.Current price is: $499.00.
  • -14%
    MSF 12.5” Pistol 5.56/.223 Ar15 Upper Assembly
    MSF 12.5” Pistol 5.56/.223 Ar15 Upper Assembly
    Style: Pistol
    Caliber: 5.56/.223
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 14.5” 5.56/.223 Pistol Build Kit
    MSF 14.5” 5.56/.223 Pistol Build Kit
    Caliber: 5.56/.223
    Style: Pistol
    Original price was: $549.00.Current price is: $499.00.
  • -14%
    MSF 13.9” 5.56/.223 Ar15 Pistol Upper Assembly
    MSF 13.9” 5.56/.223 Ar15 Pistol Upper Assembly
    Style: Pistol
    Caliber: 5.56/.223
    Original price was: $349.00.Current price is: $299.00.
  • -14%
    MSF 14.5” 5.56/.223 Pistol Upper Assembly
    MSF 14.5” 5.56/.223 Pistol Upper Assembly
    Caliber: 5.56/.223
    Barrel Size: 14.5"
    Original price was: $349.00.Current price is: $299.00.
  • -8%
    MSF 14.5” Pin/weld 5.56/.223 Rifle Build Kit
    MSF 14.5” Pin/weld 5.56/.223 Rifle Build Kit
    Style: Rifle
    Caliber: 5.56/.223
    Original price was: $599.00.Current price is: $549.00.
  • -24%
    MSF 13.9” Pin/weld 5.56/.223 Ar15 Rifle Upper assembly
    MSF 13.9” Pin/weld 5.56/.223 Ar15 Rifle Upper assembly
    Style: Rifle
    Barrel Size: 13.9"
    Original price was: $499.00.Current price is: $379.00.
  • -24%
    MSF 13.9” Pin/weld 223 Wylde 1:7 Ar15 Rifle Upper assembly
    MSF 13.9” Pin/weld 223 Wylde 1:7 Ar15 Rifle Upper assembly
    Caliber: 5.56/.223
    Barrel Size: 13.9"
    Original price was: $499.00.Current price is: $379.00.
  • -24%
    MSF 14.5” Pin/weld 5.56/.223 Ar15 Rifle Upper assembly
    MSF 14.5” Pin/weld 5.56/.223 Ar15 Rifle Upper assembly
    Style: Rifle
    Caliber: 5.56/.223
    Original price was: $499.00.Current price is: $379.00.
  • -16%
    MSF 16' 5.56 Nato 1/7 4150cmv Black Nitride barrel
    MSF 16″ 5.56 Nato 1/7 4150cmv Black Nitride barrel
    Caliber: 5.56/.223
    Barrel Size: 16"
    Original price was: $165.00.Current price is: $139.00.
  • -13%
    MSF 16” 6.5 Grendel Rifle Build Kit
    MSF 16” 6.5 Grendel Rifle Build Kit
    Barrel Size: 16"
    Style: Rifle
    Original price was: $599.00.Current price is: $524.00.
  • -13%
    MSF 16” 6.5 Grendel Upper Receiver Assembly
    MSF 16” 6.5 Grendel Upper Receiver Assembly
    Barrel Size: 16"
    Style: Rifle
    Original price was: $374.00.Current price is: $324.00.
  • -8%
    MSF 16” .350 Legend Rifle Build Kit
    MSF 16” .350 Legend Rifle Build Kit
    Style: Rifle
    Barrel Size: 16"
    Original price was: $599.00.Current price is: $549.00.
  • -13%
    MSF 16” .350 Legend Upper Receiver Assembly
    MSF 16” .350 Legend Upper Receiver Assembly
    Barrel Size: 16"
    Caliber: .350 Legend
    Original price was: $399.00.Current price is: $349.00.
  • -8%
    MSF 16” .450 Bushmaster Rifle Build Kit
    MSF 16” .450 Bushmaster Rifle Build Kit
    Style: Rifle
    Barrel Size: 16"
    Original price was: $599.00.Current price is: $549.00.
  • -13%
    MSF 16” .450 Bushmaster Upper Receiver Assembly
    MSF 16” .450 Bushmaster Upper Receiver Assembly
    Barrel Size: 16"
    Style: Rifle
    Original price was: $399.00.Current price is: $349.00.
  • -8%
    MSF 16” .458 Socom Rifle Build Kit
    MSF 16” .458 Socom Rifle Build Kit
    Caliber: .458 Socom
    Barrel Size: 16"
    Original price was: $599.00.Current price is: $549.00.
  • -13%
    MSF 16” .458 Socom Upper Receiver Assembly
    MSF 16” .458 Socom Upper Receiver Assembly
    Caliber: .458 Socom
    Style: Rifle
    Original price was: $399.00.Current price is: $349.00.
  • -14%
    MSF 16” (Pistol Gas) 300 Blackout Upper Assembly
    MSF 16” (Pistol Gas) 300 Blackout Upper Assembly
    Caliber: 300 BLK
    Barrel Size: 16"
    Original price was: $349.00.Current price is: $299.00.
  • -27%
    MSF 16” 300 Blackout Ar-15 Rifle Build Kit
    MSF 16” 300 Blackout Ar-15 Rifle Build Kit
    Caliber: 300 BLK
    Style: Rifle
    Original price was: $549.00.Current price is: $399.00.
  • -27%
    MSF 16” 5.56/.223 Rifle Kit
    MSF 16” 5.56/.223 Rifle Kit
    Barrel Size: 16"
    Caliber: 5.56/.223
    Original price was: $549.00.Current price is: $399.00.
  • -14%
    MSF 16” 5.56/.223 Upper Assembly
    MSF 16” 5.56/.223 Upper Assembly
    Barrel Size: 16"
    Caliber: 5.56/.223
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 16” 9mm Rifle Build Kit
    MSF 16” 9mm Rifle Build Kit
    Caliber: 9mm
    Style: Rifle
    Original price was: $549.00.Current price is: $499.00.
  • -14%
    MSF 16” 9mm Upper Assembly
    MSF 16” 9mm Upper Assembly
    Style: Rifle
    Caliber: 9mm
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 16″ 7.62x39mm Rifle Build Kit
    MSF 16″ 7.62x39mm Rifle Build Kit
    Barrel Size: 16"
    Caliber: 7.62x39
    Original price was: $574.00.Current price is: $524.00.
  • -13%
    MSF 16″ 7.62x39mm Upper Receiver Assembly
    MSF 16″ 7.62x39mm Upper Receiver Assembly
    Caliber: 7.62x39
    Style: Rifle
    Original price was: $374.00.Current price is: $324.00.
  • -8%
    MSF 18” .450 Bushmaster Rifle Build Kit
    MSF 18” .450 Bushmaster Rifle Build Kit
    Caliber: .450 Bushmaster
    Style: Rifle
    Original price was: $639.00.Current price is: $589.00.
  • -11%
    MSF 18” .450 Bushmaster Upper Receiver Assembly
    MSF 18” .450 Bushmaster Upper Receiver Assembly
    Caliber: .450 Bushmaster
    Style: Rifle
    Original price was: $439.00.Current price is: $389.00.
  • -9%
    MSF 18” 5.56/.223 Rifle Build Kit
    MSF 18” 5.56/.223 Rifle Build Kit
    Caliber: 5.56/.223
    Barrel Size: 18"
    Original price was: $549.00.Current price is: $499.00.
  • -8%
    MSF 18” 5.56/.223 Upper Receiver Assembly
    MSF 18” 5.56/.223 Upper Receiver Assembly
    Barrel Size: 18"
    Style: Rifle
    Original price was: $379.00.Current price is: $349.00.
  • -3%
    MSF 18” 6.5 Grendel Rifle Build Kit
    MSF 18” 6.5 Grendel Rifle Build Kit
    Style: Rifle
    Barrel Size: 18"
    Original price was: $599.00.Current price is: $579.00.
  • -12%
    MSF 18” 6.5 Grendel Upper Receiver Assembly
    MSF 18” 6.5 Grendel Upper Receiver Assembly
    Barrel Size: 18"
    Style: Rifle
    Original price was: $429.00.Current price is: $379.00.
  • -33%
    MSF 20” 5.56/.223 Wylde Ar15 Upper Assembly with 15' gen3 MLok - blem
    MSF 20” 5.56/.223 Wylde Ar15 Upper Assembly with 15″ gen3 MLok – blem
    Barrel Size: 20"
    Style: Rifle
    Original price was: $449.00.Current price is: $299.00.
  • -13%
    MSF 20” SS Fluted (Rifle Gas) 5.56/.223 Ar15 Upper Assembly
    MSF 20” SS Fluted (Rifle Gas) 5.56/.223 Ar15 Upper Assembly
    Caliber: 5.56/.223
    Style: Rifle
    Original price was: $449.00.Current price is: $389.00.
  • MSF 20” 5.56/.223 Rifle Build Kit
    MSF 20” 5.56/.223 Rifle Build Kit
    Caliber: 5.56/.223
    Style: Rifle
    $549.00
  • -27%
    MSF 3” 9mm Pistol Build Kit
    MSF 3” 9mm Pistol Build Kit
    Caliber: 9mm
    Barrel Size: 3"
    Original price was: $549.00.Current price is: $399.00.
  • -14%
    MSF 3” 9mm Pistol Upper Assembly
    MSF 3” 9mm Pistol Upper Assembly
    Style: Pistol
    Barrel Size: 3"
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 5” 9mm Pistol Build Kit
    MSF 5” 9mm Pistol Build Kit
    Caliber: 9mm
    Style: Pistol
    Original price was: $549.00.Current price is: $499.00.
  • -49%
    Blem 5” 9mm Ar15 Ar9 Pistol Upper Assembly
    Blem 5” 9mm Ar15 Ar9 Pistol Upper Assembly
    Style: Pistol
    Caliber: 9mm
    Original price was: $349.00.Current price is: $179.00.
  • -14%
    MSF 5” 9mm Pistol Upper Assembly
    MSF 5” 9mm Pistol Upper Assembly
    Barrel Size: 5"
    Caliber: 9mm
    Original price was: $349.00.Current price is: $299.00.
  • -9%
    MSF 7.5' 7.62x39mm Pistol Build Kit
    MSF 7.5″ 7.62x39mm Pistol Build Kit
    Barrel Size: 7.5"
    Style: Pistol
    Original price was: $574.00.Current price is: $524.00.
  • -13%
    MSF 7.5' Pistol 7.62x39mm Upper Assembly
    MSF 7.5″ Pistol 7.62x39mm Upper Assembly
    Barrel Size: 7.5"
    Caliber: 7.62x39
    Original price was: $374.00.Current price is: $324.00.
  • -9%
    MSF 7.5” 300 Blackout Pistol Build Kit
    MSF 7.5” 300 Blackout Pistol Build Kit
    Barrel Size: 7.5"
    Caliber: 300 BLK
    Original price was: $549.00.Current price is: $499.00.
  • -9%
    MSF 7.5” 5.56/.223 Pistol Build Kit
    MSF 7.5” 5.56/.223 Pistol Build Kit
    Caliber: 5.56/.223
    Barrel Size: 7.5"
    Original price was: $549.00.Current price is: $499.00.
  • -14%
    MSF 7.5” Pistol 300 Blackout Upper Assembly
    MSF 7.5” Pistol 300 Blackout Upper Assembly
    Barrel Size: 7.5"
    Style: Pistol
    Original price was: $349.00.Current price is: $299.00.
  • -14%
    MSF 7.5” Pistol 5.56/.223 Upper Assembly
    MSF 7.5” Pistol 5.56/.223 Upper Assembly
    Caliber: 5.56/.223
    Style: Pistol
    Original price was: $349.00.Current price is: $299.00.