AR Operating Systems: Gas Impingement vs. Piston
Can the gas-piston AR system overtake the longest serving military rifle, or will the gas impingement system soldier on?
Interests
SECTIONS
IN THE SPOTLIGHT
EXPLORE MORE NRA PUBLICATIONS
Explore The NRA Universe Of Websites
- Clubs and Associations
- Competitive Shooting
- Events and Entertainment
-
Firearms Training
- NRA Gun Safety Rules
- Firearm Training
- Become An NRA Instructor
- Become A Training Counselor
- NRA Range Safety Officers
- Shooting Sports Coach Development
- Adaptive Shooting
- NRA Gunsmithing Schools
- NRA Online Training
- NRA Program Materials Center
- NRA Marksmanship Qualification Program
- Find A Course
- NRA CCW
- NRA Training Course Catalog
- Giving
- History
-
Hunting
- Hunter Education
- Youth Hunter Education Challenge
- NRA Whittington Center
- NRA Hunters' Leadership Forum
- Great American Outdoor Show
- Hunters for the Hungry
- American Hunter
- Hunting Legislation Issues
- State Hunting Resources
- NRA Institute for Legislative Action
- American Rifleman
- Adaptive Hunting Database
- Outdoor Adventure Partner of the NRA
- Law Enforcement, Military, Security
- Media and Publications
-
Membership
- Join The NRA
- NRA Member Benefits
- Manage Your Membership
- NRA Store
- NRA Whittington Center
- NRA Endorsed Member Insurance
- NRA Membership Recruiting
- NRA State Associations
- NRA Membership For Women
- NRA Life Membership
- Renew or Upgrade Your Membership
- NRA Junior Membership
- NRA Business Alliance
- NRA Industry Ally Program
- Politics And Legislation
-
Recreational Shooting
- America's Rifle Challenge
- NRA Whittington Center
- Women's Wilderness Escape
- NRA Day
- The NRA Range
- Home Air Gun Program
- Adaptive Shooting
- Range Services
- NRA Member Benefits
- Great American Outdoor Show
- NRA Springfield M1A Match
- Shooting Illustrated
- Firearm Training
- NRA Marksmanship Qualification Program
- NRA Training Course Catalog
- Women On Target® Instructional Shooting Clinics
- Safety and Education
- Scholarships, Awards and Contests
- Shopping
- Volunteering
-
Women's Interests
- NRA Membership For Women
- NRA Women's Network
- Women On Target® Instructional Shooting Clinics
- Refuse To Be A Victim®
- Women's Wilderness Escape
- Women's Programs Endowment
- Jeanne E. Bray Memorial Scholarship
- Marion P. Hammer Women Of Distinction Award
- Sybil Ludington Women's Freedom Award
- Women's Wildlife Management / Conservation Scholarship
- Become An NRA Instructor
-
Youth Interests
- Eddie Eagle Treehouse
- Scholarships, Awards & Contests
- NRA Day
- NRA Marksmanship Qualification Program
- Youth Education Summit
- Adventure Camp
- Youth Hunter Education Challenge
- National Junior Shooting Camps
- Youth Wildlife Art Contest
- Home Air Gun Program
- NRA Junior Membership
- NRA Family
- Eddie Eagle GunSafe® Program
- NRA Gun Safety Rules
- Collegiate Shooting Programs
- National Youth Shooting Sports Cooperative Program
- Request for Eagle Scout Certificate
