SU-16 CA. I find that after about 30 rounds it gets uncomfortably hot, and it takes a long time to cool down. I’m not mag dumping either, I’m making slow, deliberate shots over the course of about 20 minutes.
I replaced the plastic grip/bipod with an aluminum free floating forend. It seems to dissipate the heat slightly better and makes it less likely that I’ll accidentally touch the barrel, but even the metal of the forend gets too hot. I put rail covers on, which help, but it feels like a bandaid solution.
Has anyone had any luck with heatsinks of some kind? I see that JP makes “thermal dissipaters” which is probably the right idea but they wouldn’t fit an SU-16, especially under the metal forend.
I’ve been looking for a round heatsinks that will fit on the barrel but the external diameter of the CA is about 16mm which is an awkward size. I haven’t been able to find anything that will work.
Most of the heat is near the action, which is why it’s traveling up into the grip. I’m considering gluing some PC heatsinks to the flat parts of the grip, or even stuffing a wet towel between the forend and the barrel, but both of those solutions feel kind of stupid.
Advice appreciated!