Space Dandy

The following weapons were used in the anime series Space Dandy:

AK-47

A Gogol Empire-hired mercenary uses an AK-47 assault rifle in "Sometimes You Can't Live with Dying, Baby".

Authentic AK-47 built from US Receiver. This is an Actual Screen used AK-47 from the film We Were Soldiers (built by Cinema Weaponry) - 7.62x39mm

The beret-wearing mercenary prepares to engage a zombie.

The mercenary is surrounded by zombies. Note that the 30-round magazine in this shot is animated a bit larger than the actual magazines used for the AK-47.

Panzerschreck

Dandy somehow was able to pull a Panzerschreck (with the stock incorrectly positioned on the front...) from his back in "There's Always Tomorrow, Baby" to destroy a calendar that was responsible for maintaining the "Groundhog Day"-style time loop.

RPzB 43 "Panzerschreck" rocket launcher with rocket - 88mm.

From out of nowhere, Dandy pulls out a loaded Panzerschreck.

You can see the flip-up sight of the Panzerschreck.

"Tomorrow!" Dandy aims the Panzerschreck at the calendar.

The front part of the Panzerschreck. Note Meow and QT covering their ears to avoid being temporarily deafened by the backblast.

Sten Mk III

What appears to be a Sten Mk III is used by Dandy when he first attempts to destroy the calendar causing the groundhog loop in "There's Always Tomorrow, Baby".

Sten Mk III - 9x19mm.

Dandy prepares to raise the Sten Mk III.

The Mk III being fired to take out the calendar.