Micro 16 assault rifle

The Micro 16 assault rifle, also known as the "Carter Special", is a custom-made rifle developed and used by Samantha Carter during the Stargate Program's seventh year of operation. She used it prior to switching back to the FN P90 Personal Defense Weapon. According to the DVD commentary of Avenger 2.0, it was hard to procure P90 props due to the Iraq war.

Behind the scenes
Felcan Enterprises, the armorers who supplied firearms to the show, assembled the weapon by using parts from three different weapons. The base weapon is an Olympic Arms K23B "Stubby" carbine with a 7.25" barrel, much shorter than that of a Colt CAR-15 or Colt M-4 Carbine. The stock is an aftermarket Bell & Carlson Model #6906-02 Black Textured Synthetic Thumbhole Buttstock. The weapon's fore-end uses Bushmaster's proprietary four-direction Picatinny rail interface and usually mounts a tactical vertical grip. An ELCAN OS3 4x28 after-market reflex optical sight is shown mounted on the Picatinny rail atop the receiver. Carter almost exclusively uses a 100-round Beta C-Mag with this weapon, but it will accept any M16/ M4 magazines.