Michele Scarabelli plays a bad girl and struggles with the redhead heroine for possession of a gun. The catfight starts at 0:33.

https://www.youtube.com/watch?v=aergJRJFcQ4
This is a very nice struggle. Not some silly, catty battle over a guy, but a desperate, high-stakes, life-or-death fight. Helen, the hard-faced blonde, has murdered her husband and knows she'll be facing a life sentence if she's apprehended. But when her accomplice arrives and gets the drop on private detective Nick Slaughter and his sidekick, Sylvie, a feisty redhead, she thinks she's got away with it. And if Nick and Sylvie have to be killed too, along with the woman they tried to kill earlier, to cover up the crime, so be it.
But the would-be murder victim kicks the gun out of the accomplice's hand, and it goes sliding across the floor. Helen's face is a mix of panic and determination, and she goes for the gun first, but the feisty redhead reacts instantly and tackles her roughly to the floor before she can get to it. What follows is a short but desperate struggle. Helen is reaching for the gun, and so nearly gets her hand on it, only for Sylvie to pull her back at the last moment. They roll over in a tangle, then lunge for the gun again, both of them reaching desperately for it, both of them getting their hands on it briefly before Sylvie gets the better of Helen, scooping up the gun and holding the blonde murderess in check.
The look on Helen's face says it all: her expression is part glaring hatred at Sylvie, who she underestimated, and part absolute despair: she knows that she so nearly got to the gun and would have got away with everything, but was tackled down and overpowered by the smaller redhead, and now faces a life sentence in prison.
Great summary of this gun struggle catfight. Helen spots the gun and thinks she can soon swing things in her favour if she picks it up. Indeed, Helen's facial expression is great. It's a mixture of hate and desperation when she looks at Sylvie. The struggle for the gun is lost
and the villainess realises that her plan has been thwarted. Do you also like Sylvie's nylon-clad legs? It's the perfect attire for a catfight.
Thanks. You can hear the desperation in Helen's voice as she's roughly tackled down and then pulled back by Sylvie, her hand brushing the weapon, but unable to grip it and pick it up. You can also hear her despair and rage as the feisty redhead gets to the gun and scoops it up. A split second and a few centimeters making the difference between Helen getting the gun and getting away with it, as opposed to Sylvie getting it, with Helen going to prison for life, for her husband's murder.
There's a similar dynamic in the episode "Ocean Park", where the blonde villainess scoops up a gun, only for the feisty redhead to grab her wrist and prevent her from using it. They struggle desperately, on their feet, the gun going off twice, the villainess screaming in frustration. There have already been two murders and the blonde villainess and her male accomplice were on the point of killing another girl, to silence her, so she knows it's a life sentence if she can't get away. Sylvie has the blonde's wrists held hard and tight in her hands as they struggle, the villainess making increasingly desperate screams of exertion and frustration. Finally, the determined Sylvie draws back her fist and catches the blonde murderess with a hard punch, causing her to fall onto the sand, out cold.
The fight between the men carries on for quite a bit longer, and when we next see her, the villainous blonde is still lying there on the sand, motionless, out cold. It must have been one hell of a punch. Imagine her utter despair when she slowly comes around, dazed and confused, her jaw aching, the police on their way; her frustration and rage that despite having got to the gun first, the smaller redhead disarmed her and KOed her.
Watch from 43:50:
https://tubitv.com/tv-shows/478946/s03-e09-ocean-park