Rock River Arms LAR-15M Operator DMR Semi-Automatic Rifle 5.56x45mm NATO 16" Barrel (1)-30Rd Magazine Synthetic Stock Black Finish
The LAR-15M Operator DMR Carbine is a 16" 5.56 rifle with a 13" lightweight M-Lok handgaurd featuring Magpul MBUS Pro Sights. Includes Case
Brand Rock River Arms
Category Tactical Rifles
Series Operator DMR
Model LAR-15M
Caliber 5.56x45mm NATO
Barrel Length Range 16" to 16.99"
Stock Finish Group Black
Capacity 30+1
Stock Material Synthetic
Action Semi-Auto
Oal 36.50"
Hand Right
Sights Magpul MBUS Pro Front & Rear
Barrel Finish Black
Muzzle A2 Flash Hider
Twist 1:7"
Gun Platform AR-Style
Magazine Type AR-15
Grips Black Hogue Rubber
Handguards 13" M-LOK Free-Float
Includes Carrying Case
Receiver Material Aluminum
Safety Safety Selector Switch
Thread Pattern 1 / 2"-28 tpi
Stock Description BCM Gunfighter SOPMOD
Barrel Description 16" Chrome Lined
Barrel Length 16"
Max Capacity 30
Receiver Finish Black
Trigger RRA Two-Stage Ultra Match
Weight 7.20 lbs
Stock Finish Black
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
