The Daniel Defense MK12 SPR in 5.56x45mm/.223 Remington (MPN 02-142-13175-047) is a mil-spec AR-15 pattern rifle built on a mil-spec lower with a flared magazine well and a mil-spec upper with M4 feed ramps. Daniel Defense pairs an 18-inch cold hammer forged, salt-bath nitride-finished stainless steel barrel with a 1:7-inch twist and a rifle-length direct impingement gas system, wrapped in a 12-inch DDM4 free-float quad rail. A Geissele SSA trigger and an H buffer round out the internals, and the rifle feeds from a 20-round Magpul PMAG. It ships with no factory sights, leaving the quad rail open for optics. Among AR-platform rifles in the AR rifles category, the MK12 SPR favors shooters who want a designated-marksman-style 5.56 AR-15 with a genuine two-stage trigger.

Key Specifications

• Chambered in 5.56x45mm/.223 Remington.
• Rifled at a 1:7-inch twist on a cold hammer forged stainless steel barrel.
• Features an 18-inch barrel, salt-bath nitride finished.
• Runs a rifle-length direct impingement gas system.
• Includes a 12-inch DDM4 free-float quad rail.
• Ships with a Geissele SSA trigger.
• Feeds from a 20-round Magpul PMAG.
• Ships with no sights installed.
• Weighs approximately 6.5 pounds.

Frequently Asked Questions

What trigger does this rifle use? A Geissele SSA two-stage trigger.

What handguard does this rifle use? The 12-inch DDM4 free-float quad rail.

Buy the Daniel Defense MK12 SPR 5.56mm

A designated-marksman-style 5.56 AR-15 with a genuine two-stage trigger is exactly what the MK12 SPR delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.