After the Mk. I and the Mk. II blaster this is no 3 in the line of Buck Rogers sidearms, the gun Buck has drawn on the movie poster. This weapon was never used in the series and looks like a melt between the TOS BSG Colonial Blaster and the blasters used in the Buck Rogers movie and TV series. However, it is not merely a creative invention by the artist who designed the poster. It is a toy made by IDEAL in the 1960s for a "Man From U.N.C.L.E." toy series. The artist added a muzzle to the barrel so that the weapon looks more futuristic and more like the guns used in the Buck Rogers movie. The design process is almost complete; I'm just verifying the final size of the model. Here are some pics of the SketchUp model. Enjoy!