Originally from AGD quote:
Level 5 01/01/91:
Rear nubbin ball drop
Level 5.1 02/11/91:
Milled frame to allow .750 pin
Level 5.2 04/09/91:
Extended, drilled power tube tip
Small ID power tube
Level 6.0 05/18/91:
Drop in sear
One piece barrel
Square spring
Wire nubbin
Large air chamber
Power Feed
Crown Point barrel
Level 6.5 08/21/91:
Extended power piston
Countersinked power tube tip
Level 6.6 11/11/91:
Computer designed power tube tip
Level 7.0 04/01/92:
Expanded air chamber with soldered on power tube tip
Except for the Automag in front, its usually the man behind the equipment that counts.