Image 1 of 6
Image 2 of 6
Image 3 of 6
Image 4 of 6
Image 5 of 6
Image 6 of 6
Daniel Defense MK12 18” 5.56 NATO DDMA railed upper “ complete”
The MK12 Upper Receiver from Daniel Defense is built around an 18" stainless steel barrel, engineered with a rifle-length direct impingement gas system and utilizing the MK12 gas block, which is built to Crane Specifications for USSOCOM. The Daniel Defense MK12 Upper Receiver features a rugged hard coat anodized Mil-Spec aluminum upper with a hammer forged stainless steel 18" barrel in a 1-7 twist with a MK12 profile.
MK12 low profile gas block machined from 416 hardened steel, rifle length
Daniel Defense 17-4 PH stainless steel flash suppressor
Chrome Lined M16 profile bolt carrier group
6061-T6 hard coat anodized 12" Daniel Defense DDM4 Rail
The MK12 Upper Receiver from Daniel Defense offers rugged dependability and precision accuracy in a complete package.
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
Specifications
Barrel Contour:
Medium
Finish:
Matte
Caliber:
5.56x45 NATO
Barrel Length:
18.00
Color:
Black
Make Model Fit:
AR-15.Universal
Item Length (Inches):
18.000
Twist:
1-7
Receiver Style:
Complete
The MK12 Upper Receiver from Daniel Defense is built around an 18" stainless steel barrel, engineered with a rifle-length direct impingement gas system and utilizing the MK12 gas block, which is built to Crane Specifications for USSOCOM. The Daniel Defense MK12 Upper Receiver features a rugged hard coat anodized Mil-Spec aluminum upper with a hammer forged stainless steel 18" barrel in a 1-7 twist with a MK12 profile.
MK12 low profile gas block machined from 416 hardened steel, rifle length
Daniel Defense 17-4 PH stainless steel flash suppressor
Chrome Lined M16 profile bolt carrier group
6061-T6 hard coat anodized 12" Daniel Defense DDM4 Rail
The MK12 Upper Receiver from Daniel Defense offers rugged dependability and precision accuracy in a complete package.
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
Specifications
Barrel Contour:
Medium
Finish:
Matte
Caliber:
5.56x45 NATO
Barrel Length:
18.00
Color:
Black
Make Model Fit:
AR-15.Universal
Item Length (Inches):
18.000
Twist:
1-7
Receiver Style:
Complete

