Daniel Defense DDM4 MK12 Rifle, 5.56 NATO, California Compliant

Product Description

The Daniel Defense DDM4 MK12 Rifle offered here is a semi-automatic 5.56 NATO rifle built by Daniel Defense in its California Compliant configuration, part number 02-142-13175-055. Outside a restricted state? The standard Daniel Defense MK12 rifle ships with a 32-round magazine.

We are going to be straight with you about this page. The MK12 is a distinct configuration in the Daniel Defense catalogue and this is the compliance-built version of it, but we do not have verified, SKU-specific figures for its barrel length, profile, gas system, rail or magazine. Rather than copy numbers from a sibling rifle and risk being wrong, we have left them out.

What we can tell you is how Daniel Defense builds rifles, because that is consistent across the line. AR-15 barrels are cold hammer forged from Chrome Moly Vanadium steel, chrome lined, Mil-Spec heavy phosphate coated and HP/MPI tested — cold hammer forging being the process Daniel Defense uses to produce what it describes as the most accurate and longest-lasting barrels attainable. Receivers are CNC machined 7075-T6 aluminium, Type III hard coat anodized. Rails are CNC machined 6061-T6 aluminium, and Daniel Defense free float rails bolt to the upper receiver so the rail does not disturb barrel harmonics. Bolt carrier groups are M16 profile, Mil-Spec MP tested, chrome lined, with a properly staked gas key. Buttstocks and pistol grips are glass filled polymer with soft touch overmolding, and the buttstock carries a nonslip cheek weld, interchangeable butt pads and an integral QD point.

Key Facts

• Brand / Model: Daniel Defense DDM4 MK12
• Manufacturer Part Number: 02-142-13175-055 | UPC: 815604015806
• Legal category: Rifle | Class: California Compliant
• Action: Semi-automatic | Caliber: 5.56mm NATO
• Manufacturer: Daniel Defense
• Barrel length, profile, twist, gas system, rail and magazine: Send us a message to confirm for this part number
• Brand build standard — barrels: Cold hammer forged Chrome Moly Vanadium steel, chrome lined, Mil-Spec heavy phosphate coated, HP/MPI tested
• Brand build standard — receivers: CNC machined 7075-T6 aluminium, Type III hard coat anodized
• Brand build standard — bolt carrier group: M16 profile, Mil-Spec MP tested, chrome lined, properly staked gas key
• Brand build standard — furniture: Glass filled polymer with soft touch overmolding; QD point in the buttstock

California Compliant configuration

Daniel Defense catalogues this MK12 as a California Compliant SKU. Compliance requirements change, are interpreted differently from one locality to the next, and a build that satisfies them today may not later. Western Sport will not tell you this rifle is legal where you live. Confirm the current requirements for your own state, county and city before ordering.

What we will confirm before anything ships

Barrel length and profile, gas system length, rail model and length, muzzle device, trigger, magazine configuration, and whether the part number we can source is what you actually want. We would rather have that phone call than sell you the wrong rifle. Meanwhile, browse the Daniel Defense rifle range, compare the DDM4 rifle family, and look at optics.

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: What barrel length is this Daniel Defense MK12?

A: We are not going to guess. We do not have verified SKU-specific barrel data for this part number in front of us, and publishing a figure copied from a sibling rifle would be worse than publishing nothing.

Q: Why does this page list fewer specifications than your other rifle pages?

A: Because we only publish specifications we can tie to the exact part number. For this MK12 SKU we have the manufacturer, model, calibre and compliance class confirmed, and not the rest.

Q: Is this MK12 legal in California?

A: We cannot tell you that. Daniel Defense builds this SKU as a California Compliant configuration, but the requirements change and vary by locality, and compliance is your responsibility to verify for your own address.

Q: What do all Daniel Defense rifles have in common?

A: Cold hammer forged Chrome Moly Vanadium barrels, chrome lined, heavy phosphate coated and HP/MPI tested; CNC machined 7075-T6 receivers with Type III hard coat anodizing; M16 profile, MP tested, chrome lined bolt carrier groups with staked gas keys; and free float rails bolted to the upper receiver.

Q: Can I order it and sort the details out later?

A: We would rather do it the other way round. It avoids the situation where a rifle arrives configured differently from what you pictured.

Q: Does this rifle require an FFL transfer?

A: Yes. Every firearm must be transferred through a licensed FFL. Western Sport is a licensed FFL and SOT and can complete the transfer at our counter, or ship to a licensed dealer closer to you.