Board Thread:General Nerf discussion/@comment-27306930-20190109040030/@comment-3362895-20190119121832

Elliott: I was briefly mystified by this idea that the Helios was incompatible with the 12-round magazine. I tested out the theory on my own inventory and found no problem. Then I remembered that I recently read a report somewhere - possibly on a Facebook group - which described a slight modification by Hasbro to the 12-round Rival magazine. Apparently, this was done to dissuade the use of the 12-round mag with third-party blasters such as the Rivalburn. Maybe you have one of these later-revision magazines? In any case, it was discovered that a simple touch-up with a dremel was enough to remove the extra ridge causing the incompatibility.

Meanwhile, while priming the Helios blaster I don't really find much of an issue in bracing the butt of the blaster against my shoulder. Furthermore, I find that if I put the priming handles of two blasters on opposite sides, I can effectively dual-wield!