RIS meaning in Regional ?

Answer: What is Rail Integration System mean?

Rail interface system or rail integration system (RIS for short, sometimes also referred to as rail accessory system, RAS) is a generic term for a standardized rail system for attaching accessories to small firearms such as pistols, rifles and light machine guns. Such accessories commonly include tactical lights, laser aiming modules, forward hand grips for improving weapon handling, telescopic sights for long-range targets, and reflex sights/red-dot sights for short/medium-ranged targets, back-up iron sight, bipods/tripods, and bayonets.

reference

Full Form	Category
Research Information Systems	Academic & Science
River Information Services	Academic & Science
Rotational Isomeric State	Academic & Science
Ruamrudee International School	Academic & Science
Research Interest Sections	Academic & Science
Rishiri	Airport Code
Richfield International LTD.	Business
Retirement and Insurance Solutions	Business
Retail Improvement Specialist	Business
Radiology Information Systems	Business
Regional Innovation Strategies	Business
Regional Innovation And Strategy	Business
Relocation Information Services	Business
Reliable Internet Systems	Business
Regional Innovation Strategy	Business
Reprographic Imaging Services	Business
Reviving the Islamic Spirit	Community
Rainbow International School	Community
Researchers in Schools	Community
Ridgecrest Intermediate School	Community
Raster Image Set	Computing
Reduced Instruction Set	Computing
Radio Information Service	Computing
Retail Information System	Computing
Recoverable in-Doubt Structure	Computing
Remote Installation Server	Computing
Research and Instructional Support	Computing
Reverse Image Search	Computing
Radeon Image Sharpening	Computing
Robotics Invention System	Computing
Remote Install Services	Computing
Reservoir Induced Seismicity	Earth Science
Routing Information Service	General
Resin Impregnated Synthetic	General
Roadway Inventory System	General
Regulation Information System	General
Regulatory Issue Summary	General
Raggruppamento Investigazioni Scientifiche	General
Reputation Integrity Service	General
Radiation Induced Signal	General
Retirement Income Stabilizer	General
Road Information System	General
Reparatur Informations System	General
Radiology and Imaging Specialists	General
Retail Inkjet Solutions	General
Retail Information Systems	General
Retirement Income Specialist	General
Remote Installation Services	General
Radical Isolation Suit	General
Really Insane Search	General
Restoratative Integral Support	General
Registration Information Sheet	Governmental
Regulatory Impact Statement	Governmental
Regulatory Information Specialist	Governmental
Retroviral Immunology Section	Governmental
RISHRA	Indian Railway Station
Radboud International Students	International
Republik Indonesia Serikat	International
Russian Imperial Stout	International
Radiological Information System	Medical
Resistance, Immunity, Susceptibility	Medical
Radiology Information System	Medical
Radiologically Isolated Syndrome	Medical
Reconnaissance Information System	Military and Defence
Remote Installation Service	Networking
Regional Investment Strategy	Regional
Regulation Impact Statement	Regional
Rail Integration System	Regional
Rail Interface System	Regional
Research Information System	Space Science
Reporting Identification Symbols	Space Science
Recreation and Intramural Sports	Sports