Bushmaster Assault Rifle USAC-556

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    Jim, Thanks for the info, I'll check it out!Tony, picture of the carrier underside down below. (PM if needed more details)

Hereby some more information about the USAC rifle to field strip:
Use the tip of cartridge to push the retention ring for the recoilspring into the gastube, 

Now pull the clip holding this ring in place out (upwards).

Rotate this ring upside-down (180 degrees) so the flat side is on top and inline with the boltcarrier.

Now you can slide the whole carrier to the rear, pull the cocking handle out, and pull the assembly out of the "upper".

And here's the bolt and carrier completely stripped, all done with the tip of a cartridge!

This looks a very simple but smart way to produce this gun, just some flat bars of steel welded together.  ( Max Gera would have hated it )

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Luc V. Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 09 Mar 2008 Location: Belgium Status: Offline Points: 1433	Post Options Post Reply Quote Luc V. Report Post Thanks(0) Quote Reply Posted: 14 Jul 2025 at 1:31pm
	Jim, Thanks for the info, I'll check it out! Tony, picture of the carrier underside down below. (PM if needed more details) Hereby some more information about the USAC rifle to field strip: Use the tip of cartridge to push the retention ring for the recoilspring into the gastube, Now pull the clip holding this ring in place out (upwards). Rotate this ring upside-down (180 degrees) so the flat side is on top and inline with the boltcarrier. Now you can slide the whole carrier to the rear, pull the cocking handle out, and pull the assembly out of the "upper". And here's the bolt and carrier completely stripped, all done with the tip of a cartridge! This looks a very simple but smart way to produce this gun, just some flat bars of steel welded together. ( Max Gera would have hated it )

jw4570 Members Profile Send Private Message Find Members Posts Add to Buddy List Callahan's Auto Mag Joined: 08 Mar 2008 Location: FL Status: Offline Points: 1334	Post Options Post Reply Quote jw4570 Report Post Thanks(0) Quote Reply Posted: 22 Aug 2025 at 1:53am
	I remember these being advertised. I have seen a couple around, but too much money for the novelty for me. Now for the FAL variants. I have several Semi versions on DSA receivers. I don't have any original (Select Fire). Most of mine are custom, but I have a very early FN STG Austrian kit before Steyr took over built up. Thanks for sharing the Bushmaster, it was a trip down memory lane.