less the gun, more the optic. many red dots and the like have a front and back lens cover, so you dont put the damn thing on backwards. it may sound redundant, but in combat, you need things to go as smoothly as possible, redundancies are your friend
**** , I have made a mistake in my very first post, and have only noticed it after posting. Not wanting to delete it, and post again, I have commented to myself the correction of the sentence, and describing my frustration by use of the word " **** ".