I've just gotten a BCM 16" rifle. I'm debating two optic options. I have on hand a VX III 3.5-10x50 in an A.R.M.S. mount. The LGS has an MK AR 1.5-4x20 with what they are calling "a tactical mount $100 value" included on sale for $350. I don't expect to be shooting beyond 200 yards/meters or so and usually half or less than that. So, do I want to use the big scope I already have or go with the probably much lighter MK AR.