What are the improvements in the AR/GB?
Changes in the AR/GB over time include:
1. Changed the grind from hollow ground to full bevel ground (more info can be found in Why a Full Bevel Grind instead of a Hollow Grind?)
2. Hollow Ground AR/GB were numbered, full bevel ground AR/GB are not numbered.
3. Changed from single thumbstud to duel thumbstuds
4. Went to Non adhesive bearings
5. Dropped the tip deeper into frame when closed
6. Changed the bump stop from .125” to .152”
7. Removed material from lower area of blade to facilitate rotation
8. Upgraded detent ball size
9. Upgraded belt clip and added ambi-carry option
10. Radiused G10

AR with Hollow Grind
(Photo by BoySetsTheFire on USN)

AR with Full Bevel Grind
(Photo by HKSIG45)

Old Style Belt clip (top), New Style Ambi-belt clip (middle), Right Side of AR showing holes in G10 for New Style Ambi-belt clip (bottom)
(Photos by DL Vega (top) and EOD ROB (middle, bottom) on USN)

Ranger Green G10 (radiused) GB w/ TAD Gear Tritium thumbstuds
(Photo by cqbdude on USN)