The DOC MD15

BILLET LOWER GEN 2

• Lower receiver is billeted from 7075 T6 aluminum with a solid piece trigger guard and cut out shelf.
• Right side bolt release
• Flared mag well for faster reloads under stress.
• Enhanced buffer tube features
  • Position drain holes to that easily removes water in maritime environments and prevents build up of gas and creating smoother cycling of BCG.
  • Carrier support extension that guides BCG into the extension prohibiting carrier tilt and excessive carrier wear while holding the buffer pin in place and making backing out under recoil impossible.
• MD H1 buffer and stainless steel cryo treated flat wire buffer spring that eliminates “twang” noise and increasing forward pressure which greatly increases reliability.
• Geissele 2 stage SSA trigger

• Billeted upper receiver from 7075- T6 aluminum to extremely tight tolerances to ensure proper cycling and a perfectly flat surface for flush fit for the barrel.
• The barrel and the upper receiver are thermal fit to lock the barrel in for an extremely tight connection. This increases the rifles durability and gives it bolt like accuracy.

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

• • 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
  • Retention: System and anti-rotational tabs to prevent movement

• 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

• 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.
• 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.

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.