If it is, I had one of these on my old matrix. Piece of cake to fit. Really small allen key screw on the side if I remember rightly. Undo that, slide onto rail, tighten up. Rail screws onto grip frame either inside or through two larger allen bolts. (cant remember exactly which).
Either way, its easy stuff. So long as you can use a allen key, your all good.
If your needing to replace or fit new elbows then thats a different story. You will need either locktite or tape.
Personally I would use PTFE tape, but thats just me, but if ur gonna use glue go to your local DIY shop as I found it the best place for stocking it and u can get different strengths, so check which one your getting. As topchef recommended check the stickies