Super helpful. I'm thinking about doing the sniper adventure challenge in 2024 which is basically a 50-70 mile adventure race with some shooting, so trying to optimize for a lightweight rifle.
US optics has the TS-12 in 3-12x which is only like 18 oz, and was between getting the SFP for 300 or FFP for 500ish. Sounds like the latter, unless I can find a better lightweight scope (had also considered the Razor LHT 4.5-22x FFP vs 3-15x SFP)
Buy the USO in SFP unless you're fine with not being able to actually see their non illuminated FFP version's reticle until you crank it up to at least 8x-10x magnification.
Around $300 is the last sale price I last saw them for the FFP USO TS12 at either EuroOptic or Scopelist only few months ago maybe it's still $299 for their FFP. Don't get ripped off buying Chinese made scopes regardless of brand label.
I have the much cheaper Vector Veyron brand version of the Chinese USO TS12 scope in both FFP $140 and SFP $100 and also the $150 Discovery Optics version as well. Very slight differences are the reticle and minor cosmetics.
A buddy of mine owns the $500 USO FFP version who actually bought it for over $500 against my advice not to being an overpriced Chinese Vector Veyron or Discovery VT3. It's literally the same Chinese scope. USO has a lifetime warranty while the Discovery and Vector branded versions only have a 3 and 5 year warranty. All of the FFP version's are impossible to pick up their reticles on lower magnification below 10x or 8x if you have young eyes with perfect vision.
IMHO the Japan made Vortex Razor LHTs are way too overpriced for what they really are even when purchased at their $800-$1000 3-15x/4.5-22x sale prices. You're better off with some better quality light weight Chinese made scopes at least for better glass and turrets such as the Burris Signature HD E3 illuminated 3-15x (cheapest I seen it was on sale for $349.99 free shipping at Sportsman's few months ago) or Hawke Frontier 3-15x illuminated ($349.99 at Cameraland on sale and $399.99 4-20x model few months ago). These are around 20 oz or less. The Hawke Frontier has about the same image quality as the Razor LHT and the Burris Signature HD has better image quality than the Razor LHT and more like a Leupold VX5HD. There's several others who were disappointed in the overall quality or lack thereof with their Razor LHTs who already posted their dissatisfaction on this forum.
If you're going to actually buy the Chinese USO TS12 anyway don't get ripped off knowing they go on sale for $299 (FFP). After owning and using the other brand labeled twin versions they're ok for a 22 or air gun and not for medium to long distance shooting. Benefits are compactness like a UTG compact (not that good) with comparable optics under 20 oz and close focus 10 yard parallax.
Leupold VX5HD is another better option than the Razor LHTs especially with the fire dot duplex and ZL turret, now the Leupold would actually be worth paying regular price for but can be bought with a discount from places such as DVOR or Optics Planet with coupon code by signing up for their email or text notifications. Other places may have some other discount incentives for Leupold as well when you search the net. Maybe even try Sport Optics with their 13% off regular prices optics.
There's also Meopta Optika 5 4-20x illuminated Z Plus reticle which literary smokes the image quality on the Razor LHT. Made in Europe by same mfg as original Zeiss scopes such as their Conquest. Only downside is no zero stop and slightly heavier than your 20 oz want. Price can be "haggle down" to around $375 at Scopelist or Optics Planet maybe even cheaper if Sport Optics still have their 16% off European scopes. $459 regular price and this one's also actually worth paying regular price for but you really don't need to. I think Cameraland also sells them where prices are negotiable as well but not sure if they can do $375 with free shipping though so best to phone them. Image quality in Meoptas are similar to Zeiss V4 and V6 level.
B&H Photo had Meopta Optika 5 2-10x last recent sale were for $299 and $349 depending of reticle and side focus parallax options. Burris Signature HD 2-10x last sale was around $200 I forget exactly from where though since I don't normally look to buy 10x and prefer higher magnification with at least side focus parallax so I just made a mental note on the price since the Chinese Burris Signature HD scopes are in fact nearly good in comparison to Japan quality scopes from LOW.