I'm looking at buying an MP5 SD .22LR. I've seen some pretty good reviews about the Walther model imported by Umarex, and I'm leaning towards getting one of those.
What are my options to put a picatinny rail on this thing? Also, is there a specific tri-rail forearm that will work with the larger SD barrel shroud?
What are my options to put a picatinny rail on this thing? Also, is there a specific tri-rail forearm that will work with the larger SD barrel shroud?

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