Mitchell Defense “Doc” MD-15

8620 M16 Style Carrier

• Material: 8620 steel, known for its excellent balance of strength, toughness, and wear resistance.
• Coating: ArmorLube Advanced DLC (Diamond-Like Carbon) coating, which provides a very low coefficient of friction, enhancing smooth operation and reducing wear.
• Process:
  • Heat Treated: This process increases the hardness and strength of the steel, ensuring it can withstand the rigors of repeated use.
  • Final Grind Before Plating: Ensures a precise fit and finish, which is crucial for reliable operation.

Carpenter 158 5.56/.223 Bolt

• Material: Carpenter 158 steel, a high-strength, corrosion-resistant alloy known for its superior mechanical properties.
• Coating: ArmorLube Advanced DLC coating, which not only reduces friction but also provides a unique, sleek appearance.
• Process:
  • Heat Treated: Enhances the bolt’s strength and durability.
  • Shot Peened: This process introduces compressive stresses on the surface, increasing fatigue life and resistance to stress corrosion cracking.
  • MPI (Magnetic Particle Inspection): Ensures there are no surface or near-surface defects, guaranteeing the highest quality.

4130 Billet Gas Key

• Material: 4130 steel, a chromium-molybdenum alloy known for its high strength and toughness.
• Sealed for Gas Leakage: Ensures that gas is properly directed and does not escape, maintaining optimal function.
• Coating: ArmorLube coating, which provides a low-friction surface and enhances durability.
• Process:
  • Properly Seated with Optimized Carrier Screws: Ensures a secure fit and optimal performance.
  • Properly Staked: The screws are staked to prevent them from loosening over time, ensuring long-term reliability.

4140 Cam Pin

• Material: 4140 steel, a high-strength, low-alloy steel with excellent mechanical properties.
• Coating: ArmorLube Advanced DLC coating, which reduces friction and wear.
• Process:
  • Heat Treated: Increases the hardness and strength of the cam pin, ensuring it can handle the stresses of operation.
  • Final Grind Before Plating: Ensures a precise fit and smooth operation.

Billet Extractor

• Material: Billet steel, machined from a solid block of steel for maximum strength and precision.
• Coating: ArmorLube Advanced DLC coating, which reduces friction and enhances durability.
• Process:
  • Heat Treated: Increases the hardness and strength of the extractor.
  • Shot Peened: Introduces compressive stresses on the surface, enhancing fatigue life and resistance to stress corrosion cracking.
• Additional Features:
  • Extractor Insert Included: Ensures a secure and reliable extraction process.
  • O-Ring Included: Helps to seal the extractor and prevent gas leakage.

Firing Pin

• Material: 8640 steel, a high-strength, low-alloy steel with excellent mechanical properties.
• Coating: Hard chrome plated, which provides a hard, wear-resistant surface.
• Process:
  • Heat Treated: Increases the hardness and strength of the firing pin.
  • Ground: Ensures a precise fit and smooth operation, reducing the risk of malfunctions.

Manufacturing

• Origin: 100% American made, ensuring the highest standards of quality and craftsmanship.

This bolt carrier group is meticulously crafted with high-quality materials and advanced coatings to ensure maximum performance, reliability, and durability. Each component is designed to work seamlessly together, providing a robust and dependable system for your firearm.

The Mitchell Defense AR15 billet lower receivers are crafted with exceptional precision and tight tolerances. We start with a solid billet of 7075-T6 aluminum and machine all critical features and dimensions to ensure every receiver meets exact specifications. We then broach the magazine well for a perfect magazine fit, hand deburr, tumble, and hard coat anodize the receiver. The result of our meticulous attention to detail is an AR15 billet receiver that will last a lifetime and provide you with a worry-free, high-quality rifle.

Features:

• Material: 7075-T6 Aluminum
• Coating: Type III Class 2 Hard Coat Black Anodized
• Additional Coating: E series Cerakote
• Magazine Well: Precision broached for a perfect magazine fit
• Fire Control Group Pocket: Full M4 cut
• Bolt Release Lever: Right side, included
• Bolt Catch Pin: Threaded, included
• Rear Takedown Detent Spring: Retained with a set screw, included
• Upper Receiver Tension Screw: Included
• Buffer Tube: MD enhanced
• Spring: Proprietary flat wire spring
• Trigger: Geissele SSA

Manufacturing:

• Origin: 100% American Made

This combination of high-quality materials and precise craftsmanship ensures that your AR15 billet lower receiver will perform reliably and last for years to come.

The Mitchell Defense AR15 billet upper receivers are engineered for precision and reliability. Each upper is machined from a solid block of 7075-T6 aluminum, then hand deburred, tumbled, and hard coat anodized to ensure a flawless finish. We meticulously inspect every upper to guarantee it meets exact specifications, ensuring perfect functionality for your rifle.

Features:

• Material: 7075-T6 Aluminum
• Coating: Hard Coat Anodized
• Additional Coating: E series Cerakote
• Barrel Fit: Thermal fit barrel to upper for optimal accuracy
• Manufacturing: 100% American Made

This attention to detail and use of high-quality materials ensure that your Mitchell Defense AR15 billet upper receiver will deliver exceptional performance and durability.

THE HANDGAURD

7 Inch M-LOK Version

• Material: 6061 T6 Aluminum
• Length: 7 inches
• Mounting: Alternating M-LOK slots at 3, 6, 9 o’clock and 45-degree angles
• Top Rail: Full-length Picatinny
• QD Points: Front and rea QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

9 Inch M-LOK Version

• Material: 6061 T6 Aluminum
• Length: 9 inches
• Mounting: Alternating M-LOK slots at 3, 6, 9 o’clock and 45-degree angles
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

9 Inch Quad Version

• Material: 6061 T6 Aluminum
• Length: 9 inches
• Mounting: Full-length Picatinny at 3, 6, 9 o’clock
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

10.5 Inch M-LOK Version

• Material: 6061 T6 Aluminum
• Length: 10.5 inches
• Mounting: Alternating M-LOK slots at 3, 6, 9 o’clock and 45-degree angles
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

10.5 Inch Quad Version

• Material: 6061 T6 Aluminum
• Length: 10.5 inches
• Mounting: Full-length Picatinny at 3, 6, 9 o’clock
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

13.5 Inch M-LOK Version

• Material: 6061 T6 Aluminum
• Length: 13.5 inches
• Mounting: Alternating M-LOK slots at 3, 6, 9 o’clock and 45-degree angles
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

15 Inch M-LOK Version

• Material: 6061 T6 Aluminum
• Length: 15 inches
• Mounting: Alternating M-LOK slots at 3, 6, 9 o’clock and 45-degree angles
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides
• Retention: System and anti-rotational tabs to prevent movement

15 Inch Quad Version

• Retention: System and anti-rotational tabs to prevent movement
• Material: 6061 T6 Aluminum
• Length: 15 inches
• Mounting: Full-length Picatinny at 3, 6, 9 o’clock
• Top Rail: Full-length Picatinny
• QD Points: Front and rear QD points on both sides

7.5″, Stainless Steel, 300 BLK

• Twist Rate: 1:5
• Gas System: Pistol length
• Finish: QPQ
• Gas Block: Adjustable

8in, Stainless Steel, 5.56 NATO

• Twist Rate: 1:7
• Gas System: Pistol length
• Finish: QPQ
• Gas Block: Pinned non-adjustable

10.3 inch, Cold Hammer Forged, 5.56 NATO

• Twist Rate: 1:7
• Gas System: Carbine length
• Finish: Phosphate
• Bore Treatment: Chrome lined
• Gas Block: Pinned non-adjustable

10.3 inch, CrMov, 300 BLK

• Twist Rate: 1:7
• Gas System: Pistol length
• Finish: QPQ
• Gas Block: Adjustable

11.5 inch, Cold Hammer Forged, 5.56 NATO

• Twist Rate: 1:7
• Gas System: Carbine length
• Finish: Phosphate
• Bore Treatment: Chrome lined
• Gas Block: Pinned non-adjustable

14.5 inch, Stainless Steel, .223 WYLDE

• Twist Rate: 1:8
• Gas System: Mid length
• Finish: QPQ
• Gas Block: Pinned non-adjustable

14.5 inch, Cold Hammer Forged, 5.56 NATO

• Twist Rate: 1:7
• Gas System: Mid length
• Finish: Phosphate
• Bore Treatment: Chrome lined
• Gas Block: Pinned non-adjustable

16 inch, Stainless Steel, .223 WYLDE

• Twist Rate: 1:8
• Gas System: Mid length
• Finish: QPQ
• Gas Block: Pinned non-adjustable

16 inch, Cold Hammer Forged, 5.56 NATO

• Twist Rate: 1:7
• Gas System: Mid length
• Finish: Phosphate
• Bore Treatment: Chrome lined
• Gas Block: Pinned non-adjustable

16 inch, Proof Research Carbon Fiber Wrapped, .223 WYLDE

• Twist Rate: 1:7
• Gas System: Mid length
• Finish: QPQ
• Gas Block: Non-adjustable

18 inch, Proof Research Carbon Fiber Wrapped, .223 WYLDE

• Twist Rate: 1:7
• Gas System: Rifle length
• Finish: QPQ
• Gas Block: Non-adjustable

18 inch, Stainless Steel, .223 WYLDE

• Twist Rate: 1:8
• Gas System: Rifle length
• Finish: QPQ
• Gas Block: Pinned non-adjustable

18 inch, Proof Research Carbon Fiber Wrapped, 6 ARC

• Twist Rate: 1:7.5
• Gas System: Rifle +1 length
• Gas Block: Adjustable

18 inch, Stainless Steel, 6 ARC

• Twist Rate: 1:7
• Gas System: Rifle +1 length
• Finish: QPQ
• Gas Block: Adjustable

Stainless Steel Barrel

Benefits:

• Highly resistant to rust and corrosion, making them perfect for humid or wet environments.
• Offers consistent accuracy and precision, and is easier to clean due to its smooth surface.

Con:

• Can be more expensive than other materials and may not be as lightweight, which can affect handling.

Cold Hammer Forged Barrel

Benefits:

• Exceptionally durable and can withstand high pressures and temperatures, making them ideal for high-volume shooting.
• Often chrome-lined to enhance corrosion resistance and ease of cleaning, and the process ensures a consistent and accurate rifling pattern.

Con:

• The initial cost can be higher, and the cold hammer forging process can sometimes result in a slightly rougher bore surface.

CrMoV Cut Barrel

Benefits:

• Made from a high-strength alloy that provides excellent durability and heat resistance, suitable for heavy use and rapid fire.
• The cut rifling process ensures precise control over rifling dimensions, resulting in high accuracy and consistency.

Con:

• May not be as corrosion-resistant as stainless steel barrels and can require more frequent maintenance in harsh environments.

Proof Research Carbon Fiber Barrel

Benefits:

• Significantly lighter than traditional steel barrels, enhancing portability and handling.
• Excellent thermal properties help maintain accuracy during extended shooting sessions, and their stiffness reduces barrel whip.

Con:

• Can be more expensive than steel barrels and may require special care to avoid damage to the carbon fiber composite.

Comparison

Maintenance: Stainless steel barrels are the easiest to maintain due to their smooth surface. Cold hammer forged and carbon fiber barrels may require special care, and CrMoV barrels can need more frequent cleaning in harsh conditions.

Corrosion Resistance: Stainless steel barrels are the most corrosion-resistant, followed by chrome-lined cold hammer forged barrels. CrMoV barrels and carbon fiber barrels require more maintenance in harsh environments.

Accuracy: All barrel types offer high accuracy, but cold hammer forged and stainless steel barrels are often considered the most precise due to their manufacturing processes.

Durability: Cold hammer forged barrels are the most durable, followed by CrMoV barrels. Stainless steel and carbon fiber barrels are also strong but may have specific vulnerabilities.

Weight: Proof Research carbon fiber barrels are the lightest, making them ideal for reducing overall weight. CrMoV barrels are lighter than stainless steel but heavier than carbon fiber.

Cost: Carbon fiber barrels and cold hammer forged barrels are generally the most expensive, while CrMoV and stainless steel barrels offer a more cost-effective balance between performance and price.

8-Inch Barrel

Benefits:

• Extremely compact and maneuverable, ideal for close-quarters situations.
• Lighter weight, making the rifle easier to handle and carry.

Con:

• Reduced velocity and range, which can affect performance at longer distances.

10.3-Inch Barrel

Benefits:

• Offers a good balance between maneuverability and performance, suitable for both close-quarters and short-range engagements.
• Slightly better velocity and range compared to the 8-inch barrel.

Con:

• Still has a noticeable reduction in velocity and range compared to longer barrels.

11.5-Inch Barrel

Benefits:

• Provides a better balance between portability and performance, making it versatile for various shooting scenarios.
• Improved velocity and range over the 10.3-inch barrel, enhancing overall effectiveness.

Con:

• Slightly heavier and less maneuverable than the 8-inch and 10.3-inch barrels.

14.5-Inch Barrel

Benefits:

• Offers a significant improvement in velocity and range, making it suitable for a wide range of shooting distances.
• Still relatively compact and maneuverable, especially with a muzzle device to meet legal length requirements.

Con:

• Slightly heavier and less portable than the shorter barrels, which can affect handling in tight spaces.

16-Inch Barrel

Benefits:

• The most common length, offering a good balance between portability and performance.
• Provides optimal velocity and range for most shooting scenarios, making it versatile and reliable.

Con:

• Slightly longer and heavier than the 14.5-inch barrel, which can be a minor inconvenience in very tight spaces.

18-Inch Barrel

Benefits:

• Offers the best velocity and range, making it ideal for precision shooting and longer distances.
• Provides a more stable platform for shooting, enhancing accuracy and control.

Con:

• Heavier and less maneuverable than shorter barrels, which can be a disadvantage in close-quarters situations.

Comparison

Portability:

• 8-Inch: Most portable and maneuverable.
• 10.3-Inch: Good balance between portability and performance.
• 11.5-Inch: Better balance, still relatively compact.
• 14.5-Inch: Slightly less portable but offers significant performance improvements.
• 16-Inch: Common and well-balanced, but not as compact as shorter barrels.
• 18-Inch: Least portable, but offers the best performance.

Velocity and Range:

• 8-Inch: Lowest velocity and range, suitable for close-quarters.
• 10.3-Inch: Slightly better velocity and range than 8-inch.
• 11.5-Inch: Improved velocity and range over 10.3-inch.
• 14.5-Inch: Significant improvement in velocity and range.
• 16-Inch: Optimal velocity and range for most scenarios.
• 18-Inch: Best velocity and range, ideal for precision shooting.

Weight:

• 8-Inch: Lightest.
• 10.3-Inch: Slightly heavier than 8-inch.
• 11.5-Inch: Heavier than 10.3-inch but still relatively light.
• 14.5-Inch: Heavier than 11.5-inch but lighter than 16-inch.
• 16-Inch: Heavier than 14.5-inch but lighter than 18-inch.
• 18-Inch: Heaviest.

Versatility:

• 8-Inch: Best for close-quarters and urban environments.
• 10.3-Inch: Good for both close-quarters and short-range engagements.
• 11.5-Inch: Versatile for various shooting scenarios, including mid-range.
• 14.5-Inch: Excellent for a wide range of distances, especially with a muzzle device.
• 16-Inch: Very versatile and reliable for most shooting scenarios.
• 18-Inch: Best for precision shooting and longer distances.

223 Wylde

Benefits:

• Combines the best features of the .223 Remington and 5.56 NATO, offering excellent accuracy and reliability.
• Can chamber both .223 Remington and 5.56 NATO ammunition, providing versatility.

Con:

• Slightly less common than 5.56 NATO, which may affect ammunition availability in some areas.

.300 Blackout (BLK)

Benefits:

• Excellent for close-quarters and suppressed shooting due to its subsonic capabilities and reduced noise.
• High stopping power and better penetration than smaller calibers, making it effective in various scenarios.

Con:

• Reduced range and velocity compared to .223 Wylde and 5.56 NATO, which can affect performance at longer distances.

5.56 NATO

Benefits:

• Widely used and available, making it easy to find ammunition and parts.
• High velocity and flat trajectory, ideal for medium to long-range shooting.

Con:

• Can be less effective at close range due to its lighter bullet and higher velocity, which can lead to over-penetration or reduced stopping power.

6 ARC (Advanced Rife Cartridge)

Benefits:

• Offers a flatter trajectory and better ballistics than 5.56 NATO, making it more effective at longer ranges.
• Improved terminal performance and better wind resistance, enhancing accuracy and effectiveness.

Con:

• Less common and more expensive ammunition, which can be a challenge for frequent shooters or those on a budget.

Comparison

Ammunition Availability:

• 5.56 NATO: Most widely available and affordable.
• .223 Wylde: Common and affordable, but slightly less available than 5.56 NATO.
• .300 Blackout: Growing in popularity but still less common than 5.56 NATO and .223 Wylde.
• 6 ARC: Least common and more expensive.

Range and Velocity:

• 6 ARC: Best range and velocity, ideal for long-range shooting.
• 5.56 NATO: High velocity and flat trajectory, suitable for medium to long-range shooting.
• .223 Wylde: Good range and velocity, similar to 5.56 NATO but with better accuracy.
• .300 Blackout: Reduced range and velocity, especially with subsonic loads, but effective for close-quarters.

Stopping Power:

• .300 Blackout: Highest stopping power and better penetration, making it effective for close-quarters and suppressed shooting.
• 6 ARC: Good stopping power and terminal performance, especially at longer ranges.
• .223 Wylde: Moderate stopping power, suitable for a wide range of scenarios.
• 5.56 NATO: Lower stopping power, especially at close range, due to its lighter bullet and higher velocity.

Versatility:

• .223 Wylde: Versatile, can chamber both .223 Remington and 5.56 NATO.
• 5.56 NATO: Very versatile and reliable for most shooting scenarios.
• .300 Blackout: Versatile for close-quarters and suppressed shooting, but less so for long-range.
• 6 ARC: Specialized for long-range and precision shooting, but less versatile for close-quarters.

Noise and Recoil:

• .300 Blackout: Can be very quiet with subsonic loads and suppressors, and has moderate recoil.
• 6 ARC: Moderate noise and recoil, but generally manageable.
• .223 Wylde: Low noise and recoil, making it comfortable for extended shooting sessions.
• 5.56 NATO: Low noise and recoil, similar to .223 Wylde.