Even though the Model 1300 was introduced in 1978, the security series (similar short-barreled offerings), including the Defender, continued to be marketed as a Model 1200 until 1989, after which, it was advertised as a Model 1300. The security series had options for: rifle sights or bead, a rifled bore and pistol grip rather than a butt. A riot version was made, with a stainless steel barrel while a marine version also had chrome plating on other parts.
Although the Model 1300 debuted in 1978, the security range (comparable compact models), including the Defender, remained available as a Model 1200 until 1989, after which it was promoted as a Model 1300. The security line featured options for: rifle sights or bead, a rifled bore and pistol grip instead of a stock. A riot model was created, with a stainless steel barrel while a marine version also had chrome plating on other components.