Re: Identification of Aikido forms in other martial art system?
As Cliff points out there are no techniques that are uniquely aikido although as a body you can say aikido or judo or ....
Gun disarms as a kata I can think of Judo's Goshin Kata but that itself has a strong aikido influence via Tomiki. Strangely I always disliked this kata mainly due to the glacial speed of how Judo kata tend to be performed. I saw it recently at speed and it looked good.