I just need to know if http://www.ndzpb.com/index.cfm?fuseaction=catalog.prodInfo&productID=26 9&categoryID=5
will fit my bolt in my Mini. I believe I have the NDZ V2 Tru-Flo, but here's a picture just in case...
If it would fit this bolt, that means I have the stock spring in right now, which could be messing with efficiency, as the stock spring isn't guaranteed to work perfectly with the NDZ bolt.
So if it would fit:
-Why wouldn't everyone use the weakest (blue) spring for the best efficiency and least amount of kick?
-Which spring should I use out of the three, or how can I find out which spring would be the best to use in my Mini?