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DSG Complete 11.5" 5.56mm Duty Grade Upper w/ 10" BCM M-LOK Rail w/ Complete BCG

Availability: In stock
SKU: DSG-4303-0012
Manufacturer part number: DSG-4303-0012
GTIN: 842361115654
Rating: 5.0 1

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Product description

Order our lightweight and durable DSG complete duty grade upper receiver, designed for corrosion-resistant 7075-T6 aluminum with type III hard coated anodized to prevent wear and tear and increase lifespan.


Complete Upper Features

Duty grade upper receiver with M4 feed ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized. BCG is M16 Profile, MPI Magnetic Particle Inspected tested, 9310 steel bolt with extra power extractor spring with black insert, properly staked gas key, black nitride coated.

We have given the BCG a M16 profile, have inspected it for magnetic particle testing to ensure no cracks are present, and have designed it with 9310 steel bolt to prevent corrosion. The complete BCG comes with an extra power extractor, black insert, and properly staked gas key, and all coated with black nitride to increase longevity.
With it, you also receive a patent pending mounting and indexing and lock up system that prevents rail movement under intense heat. Some of the notable barrel features include 5.56mm chamber, 4150 chrome moly vanadium steel, nickel boron coating on the barrel extension, and many more.
We have given the barrel a government profile and have included 100 degree recessed target crown to increase performance and functionality of your weapon. The .750 gas block seat reduces overheating, prevents bending, and improves control of weapon.
Our DSG complete 11.5” 5.56mm duty grade upper receiver is the all complete solution for your firearm. If you want an upper receiver, barrel, and barrel extension you can depend on, order our complete duty grade product today!



The MCMR Series of handguards gives the shooter modularity in the M-LOK® platform.

  • MCMR features M-LOK® Compatible mounting system.
  • Free Float Handguard eliminates loads from barrel, reducing the deflection for more accurate shooting.
  • Precision Machined Aerospace 6061-T6 Aluminum Alloy, for high strength and lightweight.
  • Proprietary engineered profile offers additional cross sectional strength.
  • Steel Barrel Nut same KMR, MCMR, and QRF series, to resist movement under heat.
  • Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
  • Handguard alone weighs 6.6 oz
  • Handguard mounting hardware 2.3 oz
  • 1.3” Inside Diameter
  • 1.5" Wide

One nylon picatinny rail section and one QD sling attachment is also included.

Note: Nylon/Polymer Picatinny rail sections are for NON-load bearing accessories only grips, hand stops, light mounts. For load bearing accessories bipod mounts, sling mounts, vertical grips, barricade supports, we recommend aluminum Picatinny rail sections. Do NOT exceed 20 in/lbs. when securing fasteners on Polymer accessories. Aluminum Picatinny rail sections may be torqued to 30 in/lbs.

Barrel Features

  • 5.56mm Chamber
  • 4150 Chrome Moly Vanadium steel
  • QPQ Coated Barrel
  • Nickel Boron coated barrel extension
  • M4 feed ramps
  • 17 twist rate
  • 1/2x28 muzzle threads
  • HP & MPI tested
  • .750” gas block seat
  • Weight 1.25 lb
  • Profile Government
  • 11 Degree Recessed Target Crown
  • Button Rifled
  • Carbine-length gas system
  • A2 Flash Hider with Crush washer
Additional information
Manufacturer: DSG Arms