Daniel Defense DDM4 300 BLK Pistol w/SB-Tactical Pistol Stabilizing Brace & DDM4 MK18 Complete Upper Assembly

Available on backorder


Daniel Defense M4 300 Pistol chambered in .300 Blackout with a factory new MK18 Complete Upper Assembly chambered in 5.56mm/.223.  This AR pistol and complete upper receiver assembly are factory new.  With this purchase you are essentially getting two AR pistols. The Daniel Defense M4 300 Pistol uses the exact same lower receiver and magazines for the MK18 (5.56mm) Pistol.  The AR pistol came from Daniel Defense as a M4 300 Pistol and the MK18 complete upper assembly is factory new from Daniel Defense in its original box. The Daniel Defense M4 300 Pistol, equipped with the SB-Tactical SOB Pistol Stabilizing Brace, was designed for those demanding a high-performance firearm chambered in the versatile 300 Blackout cartridge. Built around a 10.3” Strength-to-Weight (S2W) profile  barrel, the 300 Pistol uses standard 5.56 bolts and magazines to deliver .30 caliber projectiles with greater muzzle energy than comparable 5.56mm platforms. The increasingly popular 300 Blackout cartridge has proven itself to be extremely efficient in short-barrel rifles, yielding superior ballistics over the venerable 7.62×39 cartridge. With a wide variety of factory ammunition made for everything from home defense, target shooting, hunting, suppressed operation, and tactical applications, the 300 Pistol is capable of delivering exceptional performance from a compact, fast-handling package. Daniel Defense manufactures the highest quality complete AR15 upper receivers on the market today! Every Daniel Defense upper is painstakingly hand assembled, quality assurance tested, and test fired to ensure that the highest quality product makes it to the hands of our customers. The Daniel Defense M4 URG, MK18 comes complete with bolt carrier group and charging handle, 10.3″ Cold Hammer Forged Barrel, RIS II MK18 Rail System in Black and Daniel Defense low profile gas block.


Additional Information
Manufacturer Daniel Defense
Model DDM4 Pistol
Type Pistol:  Semi-Auto
Caliber .300 AAC Blackout & 5.56mm/.223
Action Semi-Auto
Capacity 32+1
Receiver Black Mil-Spec CNC Machined 7075-T6 Aluminum
Sights Sights not included
Barrel Length 10.5″
Overall Length 27″
Weight 5.3 lbs
Accessories SB-Tactical Pistol Stabilizing Brace;  One DD 32Round Magazine
Product UPC DDM4 02-088-22179

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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