Outfitting my Cetme: Questions

Has anyone ever used either of these parts on a Cetme? They are for HK91 & their varients, which I would think a Cetme would fall into. From what I have heard, it may require a small amount of fitting, which is ok. Does anyone have REAL world experience on these 2 parts?

1. Magpul PRS2 Adjustable Butt Stock
magpulprs-2_1263_detail.jpg



2. UTG Tri-Railed Forend
rails-2_418_detail.jpg



Here is what I am going for in the end. I photoshopped the rail in this picture and I do realize that I photoshopped the wrong rail (quad rail), but you get the idea.
Cetme.jpg
 
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