Description
Product Summary
Rock River Arms LAR-15M Assurance-UTE Carbine Semi-Automatic Tactical Rifle 5.56mm NATO 16″ Chrome Moly Steel Barrel (1)-30Rd Magazine A2 Front, Adjustable Rear Sights Black Synthetic Finish
This Assurance UTE model comes chambered in 5.56 with a 16″, CMV lightweight barrel (carbine length A2 gas block). RRA CAR lightweight quad-rail with sights attached.
BrandRock River Arms
CategoryTactical Rifles
SeriesAssurance-UTE Carbine
Caliber5.56x45mm NATO
Barrel Length Range16″ to 16.99″
ModelLAR-15M
Stock Finish GroupBlack
Capacity30+1
Stock MaterialSynthetic
ActionSemi-Auto
Oal33″
HandRight
SightsA2 Front, Adjustable Rear
Barrel FinishBlack
MuzzleA2 Flash Hider
Twist1:8″
Gun PlatformAR-Style
Magazine TypeAR-15
GripsBlack Hogue Rubber
HandguardsQuad Rail
IncludesCarrying Case
Receiver MaterialAluminum
SafetySafety Selector Switch
Thread Pattern1 / 2″-28 tpi
Stock DescriptionAdjustable RRA Operator CAR
Barrel Description16″ Chrome Moly Steel
Barrel Length16″
Max Capacity30
Receiver FinishBlack
TriggerTwo-Stage Match
Weight7 lbs
Stock FinishBlack
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
