Daniel Defense DD4 MK18RIII Semi-Automatic Short Barrel Rifle 5.56x45mm 10.3" Barrel (1)-32Rd Magazine Collapsible/Folding Stock Matte Black Finish
MANUFACTURER: Daniel Defense
FAMILY: DDM4 Series
Model: Dd4 Mk18riii
TYPE: NFA - Short Barrel Rifle
ACTION: Semi-Auto
CALIBER/GAUGE: 5.56 x 45mm
FINISH: Matte
FINISH TYPE: Black
STOCK: Collapsible / Folding Stock
Barrel: 10.3"
Overall Length: 26.5" - 30"
RATE-OF-TWIST: 1-in-7
Capacity: 32 + 1
# Of Magazines: 1
MAG DESCRIPTION: 32 rd.
SIGHTS: No Sights
SIGHT TYPE: None
THREAD PATTERN: 1/2x28
SPECIAL FEATURE: Threaded Barrel
WEIGHT: 5.7 lbs.
SHIPPING WEIGHT: 12.05 lbs.
SAFETY FEATURES: 2-Position Thumb Safety
ADDL INFO: RIS III M-LOK Rail
ADDL INFO: Mid-Length Gas System
ADDL INFO: Fully Ambidextrous Lower
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
