MSTN 11.5" Short Barrel Rifle "SBR" Upper Receiver Assembly

Orders made between November 15th & 29th will be
fulfilled and shipped after November 29th, Thanks!

  • Custom Noveske 24.5 ounce 11.5" 1x7" polygonal ss barrel
  • Feed ramps polished and contoured
  • LMT shot-peened, proof round tested, MP inspected bolt fitted at 1.4646" +0.001"/- 0.000", Ionbond Diamondblack coated down to the gas rings
  • Young Manufacturing National Match full auto bolt carrier, forged, then centerless ground, then hard chromed, then Ionbond Diamondblack coated, with gas key torqued and staked properly
  • Vltor MUR upper receiver with forward assist and MSTN logo
  • BCM/Vltor Gunfighter charging handle
  • KAC URX 3.1 10.75" forend
  • Surefire SOCOM 3P flash suppressor
  • Function tested

Gas Block

SLR adjustable gas block installed (add $150)

Upper Receiver/Forend

KAC URX 3.1 10.75" forend (included)
VLTOR VIS-KM 10" (add $150)

Charging Handle

BCM/VLTOR Gunfighter (included)
PRI Gas Buster (add $43)

Muzzle Attachment

Surefire SOCOM 3P (included)
Surefire SOCOM MB556 (add $20)
Vortex Flash Suppressor (subtract $70)


Troy® Sights/Set (add $210)
KAC Micro Sights/Set (add $306)
Aimpoint T-1 in Larue LT751 mount (add $750)
Elcan SpecterDR™ 1x4 (add $2283)


Cerakote™ Barrel (add $75)
Cerakote™ Upper Receiver and Forend, one color (add $150)
Cerakote™ Barrel, Upper Receiver and Forend, one color (add $200)