Automag files. The models I've made don't include actual threads for the most part (I didn't have a thread gauge when I made them), however the thread profile dimensions (ID and OD) are good. Some of the models posted here were obtained from Have Blue's Tech rats nest.
Inventor 2009 part (.ipt)
Description: ULE body, without the cosmetic teardrops toward the front. It's pretty accurate except for the feedneck bore, which is just an approximation.
Description: This file was released to display some of the pertinenant dimensions used in the Slug bodies. There are also some other parts that can be viewed by activating the dormant layers.
Description: This file is identical to the one above, except the body profile includes an extended rear portion which covers some of the valve (for cosmetic reasons).
Description: Frame from an E-Mag. Much of this is accurate except for the internals of the frame, where the board and solenoid are housed. The top milling is reasonably accurate. The handle shape (specifically the rear spine) is an approximation, but looks close enough.
Description: 3d solid model for the AGD Intelliframe. "The curves aren't exact, I guesstimated on the thicknesses (based on other frames), and it's missing the center cutout, but the profile is pretty accurate. It's perfect if you need to add for looks or check for alignment issues."
Description: Knurled thumbscrew, used in the frame rear.
Description: Housing/body for the Clippard MPA-3 pilot actuator assembly, which can be used to drive the sear in a pneumag conversions.
Description: Pilot/piston for the Clippard MPA-3 pilot actuator.
Valve & Internals: