I recently mounted a Bushnell AR scope to my gas piston Adams Arms AR-15.
After sighting it in, later went to clean rifle & noticed the objective lens was very fogged up.
Believing the scope to has sprung a leak, causing the lens to fog, I started looking into returning the scope for repair.
As I removed the scope from the mount, I noticed some residue on the bottom of the housing that holds the objective lens.
Using a washcloth & warm water, I wiped this residue off..then realized what I believed to be lens fogging was actually powder residue
that had collected on the lens. Seems gas is vented thru the holes on top of the handguard, below the scope & residue collects on the scope lens.
Knowing that lenses have special coatings & wanting to NOT mess up the objective lens, what would be the best way to clean the lens ?
also would like to know ideas on how to prevent this from happening again, if mounted to this AR ?
Anyone else had this problem ? If so, how'd you address it ?
Thanks in advance for helpful replies.