13.9 Complete Upper

$859.00
  • 7075-T6 type 3 hard coat, Cerro forge upper, dry film lubed, thermal fit, T-marked, and hand lapped face.

  • Assembled by MTS

  • The bore is checked with “go/no-go” gauges.

  • Barrel nut threads are seasoned upon assembly.

  • Rosco K9 Greenline Tactical nitride stainless barrel. 13.95” in length with a mid-length gas system and an optimized gas port. Barrels are checked for headspace with the bolt the upper is assembled with. Barrels are double dimpled for the gas block. Gas block set screws are set in place with loctite 272 and torqued to 20 lbs/inch.

  • Microbest nitride bolt carrier group, HPT and MPI, chrome lined bores, Sprinco ejector and extractor springs, C-158 bolt, 8620 tool steel carrier, M16 cut. These carriers are QC’d in house by MTS with a series of “go/no-go” gauges, including headspace and firing pin protrusion. Gas rings are confirmed not to be in line with each other. Gas key staking is visually checked.

  • Cross Machine and Tool 13” DRT M-LOK handguard. Barrel nut and handguard attachment hardware torqued per CMT’s spec.

  • Geissele DDC Government charging handle

  • Rearden R2 17-4 flash hider.

  • Muzzle alignment checked with rod & suppressor.

  • Atlas and plan b compatible mount secured with Rockset. “Wheat” finish.

  • This upper does not come to 16 in barrel length, all NFA rules apply.

Add To Cart
  • 7075-T6 type 3 hard coat, Cerro forge upper, dry film lubed, thermal fit, T-marked, and hand lapped face.

  • Assembled by MTS

  • The bore is checked with “go/no-go” gauges.

  • Barrel nut threads are seasoned upon assembly.

  • Rosco K9 Greenline Tactical nitride stainless barrel. 13.95” in length with a mid-length gas system and an optimized gas port. Barrels are checked for headspace with the bolt the upper is assembled with. Barrels are double dimpled for the gas block. Gas block set screws are set in place with loctite 272 and torqued to 20 lbs/inch.

  • Microbest nitride bolt carrier group, HPT and MPI, chrome lined bores, Sprinco ejector and extractor springs, C-158 bolt, 8620 tool steel carrier, M16 cut. These carriers are QC’d in house by MTS with a series of “go/no-go” gauges, including headspace and firing pin protrusion. Gas rings are confirmed not to be in line with each other. Gas key staking is visually checked.

  • Cross Machine and Tool 13” DRT M-LOK handguard. Barrel nut and handguard attachment hardware torqued per CMT’s spec.

  • Geissele DDC Government charging handle

  • Rearden R2 17-4 flash hider.

  • Muzzle alignment checked with rod & suppressor.

  • Atlas and plan b compatible mount secured with Rockset. “Wheat” finish.

  • This upper does not come to 16 in barrel length, all NFA rules apply.

  • 7075-T6 type 3 hard coat, Cerro forge upper, dry film lubed, thermal fit, T-marked, and hand lapped face.

  • Assembled by MTS

  • The bore is checked with “go/no-go” gauges.

  • Barrel nut threads are seasoned upon assembly.

  • Rosco K9 Greenline Tactical nitride stainless barrel. 13.95” in length with a mid-length gas system and an optimized gas port. Barrels are checked for headspace with the bolt the upper is assembled with. Barrels are double dimpled for the gas block. Gas block set screws are set in place with loctite 272 and torqued to 20 lbs/inch.

  • Microbest nitride bolt carrier group, HPT and MPI, chrome lined bores, Sprinco ejector and extractor springs, C-158 bolt, 8620 tool steel carrier, M16 cut. These carriers are QC’d in house by MTS with a series of “go/no-go” gauges, including headspace and firing pin protrusion. Gas rings are confirmed not to be in line with each other. Gas key staking is visually checked.

  • Cross Machine and Tool 13” DRT M-LOK handguard. Barrel nut and handguard attachment hardware torqued per CMT’s spec.

  • Geissele DDC Government charging handle

  • Rearden R2 17-4 flash hider.

  • Muzzle alignment checked with rod & suppressor.

  • Atlas and plan b compatible mount secured with Rockset. “Wheat” finish.

  • This upper does not come to 16 in barrel length, all NFA rules apply.