Walmart scopes? Don't think so!!!!
Can't attest to the Nitrex TR1s, but own a couple of the discontinued model TR2s purchased from Natchez Shooters Supplies
One is a TR2 3-15x42 SF and other is a 4-20x50 SF. Both are basically Weaver SuperSlam scopes, having same Japanese optics and internals as them. Excellent optics in them that are very clear/bright and windage adjustments track well. With Nitrex rebate of $100 and Natchez discounted pricing, both scopes were a darn good buy for a quality scope. Rebate program should have ended Dec 31.
Both scopes are mounted on centerfire rifles and my fellow shooters at range that have sat down with my rifles to critique the Nitrex scopes have been very impressed with them.
Check this 14 page thread on Nitrex by Weaver on sale! - RimfireCentral.com Forums
that should enlighten you on about most questions you can have on Nitrex scopes. Yes, its a rimfire gun site, but they also own centerfire rifles too.