[tunabreath]

Ok, so I've managed to bodge the pistol grip fore-end on. It's not exactly pretty. There was a good 7-8 mm difference in the diameters of the pieces (I assume partially because I'm missing some of the pump related fore-end parts from the 870 on my 1100). Instead of filling out the difference with an appropriately sized pipe, I sawed off a sliver of the grip and super glued it on. This made some mess that I will have to sand down/cover up, but you can't see the cuts I made because they're hidden by the barrel (and soon, the heat shield. will update on that installation when I get it).

I've also done a partial disassembly... more bad news... The M870/1100 mounting system for the magazine tube is COMPLETELY different than the CA870. There's pretty much no hope of fitting the spring series magazine tube on. The only way to lengthen it is a real steel magazine extension, or a long donor part. Like in the guide I posted at the VERY top, the unthreaded interior of the extension fits quite nicely over the threaded part of the magazine tube. I really recommend getting a plastic extension - I'm sure the fit will be better. Anyways, just reiterating what was in the guide, saw off the threaded part of the extension and fit it over. I'll probably drill some holes through and fit a pin in to make it more secure if I have the time. This will be a fair pain to do since I went for a blued metal 9 shot extension.

Does anyone by chance have a full size barrel set (no magazine tube) from either the M870/1100 or CA870 series that I could buy?