This is my take of an SMG/PDW style minimisation.
In terms of what major parts were removed, all I did was cut off the front portion, which removes the majority of the faux barrel and the battery tray. I then used the original muzzle and a short portion of faux barrel to give the minimised Rapidstrike (which I'll call RapidPDW) a proper muzzle and front iron sight.
The standard barrel minimisation seems to be to cut the Rapidstrike right down to the curve of the grey magwell grip.
I've also used a segment of the BSUK Stryfe muzzle ring to help keep barrel extensions stable, as I find especially the Retaliator barrel is fairly wobbly on the Rapidstrike.
This Rapidstrike has had a basic rewire, according to Toruk's excellent rewire guide. I might do a full rewire if I get new motors for it, but as of now it's running of stock motors so a full rewire is not totally necessary.
Thanks to the IMRs and the rewire, the RapidPDW revs up fairly fast. Certainly much faster than stock. It takes about half a second to rev up to usable RPM, and another half second to rev to near max.
Range wise, the RapidPDW is comparable to my ERayven running Barricade motors, both blasters using 2 IMRs. Accuracy isn't great, particularly thanks to the removal of the faux barrel, but Koosh darts certainly help. I wasn't looking for accuracy anyway with this build.
ROF is greatly improved from stock, getting around 5.5dps with near full charge IMRs. Certainly enough for my purposes.
I built this RapidPDW mostly for fun, but as it evolved I found a great use for it in my Uni games. Its power is better than that of stock blasters, but not so much that it causes significant pain on hits, and seems to be within our current 80fps limits (using Kooshes at least). The accuracy is not an issue thanks to Kooshes and its ROF, which is significantly greater than can be achieved with the other blasters (Strongarms, Roughcuts) used by newbies. The RapidPDW also conveniently fits perfectly in my Uni backpack.
Do let me know what you think of my RapidPDW.