Hello
It was less than just the conversion kit-
The battery is no good, has anyone fit a Lipo stick type to increase the ROF? If I hook up a 7.4 V 1100 Ma Lipo it sounds about perfect, but I do not have the correct style to fit.
I was reading up on the site about the disconnect between the ROF of the Thompson (average about 600 rpm I think) and the sound used in the movie. There is a little gizmo called a burst wizard that can be used to set an exact ROF, magazine qty, etc. Can also be used to simulate mag empty, will not shoot again until you remove and re-load. I have one for my airsoft Sterling (turned into an E11 blaster) and it works great.
http://aegwizard.com/The only issue I have is the hi-cap mag keeps jamming, I have to take it apart and investigate.
I've had a regular Thompson for a few years now, the only real weakness I have run across is the mag release- the little bit that is knurled for your thumb broke off. Otherwise the Thompsons are notorious for breaking the barrel at the front of the receiver if you hit it on a tree or something similar. Not an issue with a Pulse rifle...
Cheers