Editing Bob Long Defiant (section)

=== Differences from the Bushmaster 2000 ===

Although mechanically similar to the Bushmaster 2000, the Defiant incorporated several distinguishing features.

These included:

* [[Autococker]]-compatible barrel threading instead of the proprietary threading used on early Bushmaster 2000 markers.
* Different body milling and external styling.
* A modified grip frame incorporating finger grooves.
* Differences in the sight rail and associated bolt-pin arrangement.

Historical collector documentation identifies these features as distinguishing characteristics of the original Defiant.[2][4]

The two markers shared much of their underlying mechanical and electronic architecture.