For all you collectors out there I happened to come across my original listing of the different levels for the Mag and what was done in each. We didn't release the gun until level 5 so previous to that you will not find any. I am posting it here so I don't loose it again!
AGD
68AUTOMAG DESIGN UPDATES
Level 1:
Power tube polished and measured .385 x .600
Power tube spring full ground both sides .285 free length
Power tube insert turned for urethane o-ring and spring
On/off top turned for air flow
On/off pin ground and checked
Bolt trimmed to .275 deep to power piston
Ream inside regulator body for washer clearance
Jumbo nubbins
Level 2 09/21/90:
High strength front frame screw
Trim regulator valve for minimum clearance
Level 3 11/15/90:
Bronze power tube spring
Black spring pack
New twistlock and o-ringed barrel
Slotted power tube insert
Level 4 12/05/90:
Teflon o-ring for on/off valve
Washer for power tube
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