Aluminum piston head and noveske sound amplifying flash suppressor.
Although some have stated that an aluminum head make bring time the life span of a V2. However Id just like to add, 10,000 rounds and counting and nothing bad yet for me.

I guess no one here remembers Sledgehammer.

Captain Trunk: [Trunk watches Hammer attach something to the barrel of his gun] Is that a silencer?
Sledge Hammer: No, it's not a silencer. This little doodad is my own invention. I call it a loudener.

And more,

Sledge Hammer: [Talks to gun] I don't know about you, but I'm stuffed. What do you say we take a look at those videos I rented?
[Puts gun back in holster and goes to the living room to check out the video tapes]
Sledge Hammer: 'On Golden Gun,' 'Peggy Sue Got Murdered,' 'The Way We Wounded... ' 'Home Video Target Range,' what'll they think of next?
[Inserts 'Home Video Target Range' video into VCR and turns on TV]
Video Narrator: Shoot me. Shoot me. Shoot me. Shoot me.
[Hammer shoots TV]
Sledge Hammer: [Talking to gun] Remind me not to rent that one again. It's too expensive.

Try this one at home,

Dori: I've got an idea.
Sledge Hammer: Now you're thinking like a man!