@TeacherJim - what specifically is occurring with your eyes versus the "red" dot?
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I'll also second the recommendations for either a Vortex or a Holosun RDS over Sightmark.
Of the two, Vortex has the arguably the better warranty coverage due to their C/S department. Holosun's warranty coverage is reputedly excellent as well, but there have been consistent and persistent reports of less-than-stellar communications between C/S staff and claimant, with the latter often having to really press for follow-up/information.
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I'll also second the recommendations for either a Vortex or a Holosun RDS over Sightmark.
Of the two, Vortex has the arguably the better warranty coverage due to their C/S department. Holosun's warranty coverage is reputedly excellent as well, but there have been consistent and persistent reports of less-than-stellar communications between C/S staff and claimant, with the latter often having to really press for follow-up/information.
