MD Enhanced Bolt Carrier Group


The MD enhanced BCG is a full mass, full auto rated M4/M16 5.56/.223/ 300 blk Bolt carrier group that is made using advanced manufacturing techniques to increase its reliability and durability from the standard MILSPEC BCG.

In stock

Categories: , SKU: 40001


Introducing the MD Enhanced Bolt Carrier Group

The pinnacle of precision engineering and cutting-edge technology, meticulously crafted to elevate the performance of your M4 weapon system. Our commitment to excellence is reflected in every detail, ensuring unmatched reliability and durability in the most demanding conditions.

ArmorLube Coating:

Revolutionizing MILSPEC standards, the advanced DLC coating, ArmorLube, is the result of a decade-long collaboration with the US Army DEVCOM. Proven to drastically enhance reliability, prevent galling, corrosion, and seizure, this coating sets a new benchmark. In the taper abrasion test, ArmorLube outperformed with an exceptional 97,000 cycles, surpassing Nitride (25,000 cycles) and phosphate/Parkerizing (690 cycles).

Gas Key:

Precision torqued and staked, our gas key features optimized carrier key screws, virtually eliminating the risk of the key coming loose. A carefully applied sealant between the gas key and carrier ensures a gas-tight seal, addressing a common issue and preserving power and reliability.


Forged from solid bar 9310, our bolts undergo meticulous heat treatment for enhanced durability beyond Carpenter 158. Shot peened and precision ground to exact tolerances, the extractor, featuring an extractor O-ring, guarantees superior reliability.


The 8620 M16 carrier, precision ground to exacting tolerances, stands as a testament to our commitment to perfection. Skids ground to a flawlessly flat surface eliminate uneven wear, reducing friction and enhancing longevity.

Gas Rings:

Our SP4-coated gas rings redefine longevity. Lasting 3-4 times longer than standard rings, they significantly reduce friction, ensuring optimal performance even after extensive use.

Firing Pin:

Chrome-plated for additional durability, our firing pin ensures reliable ignition over an extended period, contributing to the overall longevity of the Bolt Carrier Group.

Rubber Gasket:

The inclusion of a rubber gasket for the extractor further exemplifies our dedication to reliability in every aspect of the extraction process.

Guaranteed to perform, the MD Enhanced Bolt Carrier Group is not just a component; it’s a precision-engineered solution that empowers your M4 weapon system with unparalleled reliability, durability, and performance. Elevate your firearm experience with the assurance that our product is designed to exceed expectations in any environment.

Additional information

Weight 1 lbs
Dimensions 10.75 × 6.5 × 2 in



9310 Steel Properly heat treated, MPI tested, Shot Peened, ArmorLube Coated

Gas Key

Sealed and staked and makde from Solid bar 4140 steel, ArmorLube Coated

Gas key screws

OCKS screws with notched edge for head staking


American Made


8620 Steel, precision ground, heat treated, ArmorLube Coated

Firing pin

Chrome Lined

Cam Pin

solid billet 4140 Steel, heat treated, ArmorLube Coated


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