Re: anyone done a mag swap in the Black Winter
Ha ha ha ha!
I agree with the above...the BW is essentially perfect in stock form and most seem to feel that way, hence little to no reports of mag swapping.
There was someone here a few years ago that tried A9 mags and found it a bit thin, preferring A8 over the A9, but it wasn't necessarily better than the stock form as I recall. Another member tried A2 mags, but ended up going back to stock, as well.
If you want something different, there are plenty of pickups that offer tweaks on the same basic formula and are fine-tuned to other types of magnets (Distortion, JB, etc).