I asked the same question on the HK forum regarding the polymer on the SL8-6 rifle. They replied that it was designed to go down to -50 deg. F. I suppose that it is probably a mil spec standard so should apply to all polymer firearms.
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.