And my 2 cents............almost nothing they make aftermarket for the SKS is worth wasting money on.
That goes for:
Scopes & mounts (the rifle and cartridge were designed for body hits within 300 yards, but can do better in the right hands at somewhat longer range).
Hi-cap mags (nice thought, but you either give up reliability of feed or ease of reloading).
Stocks (they either add a lot of extra weight or are downright unwieldy when compared with the original issued wood).
Bipods (More extra weight and some are difficult to adjust under duress or on uneven surfaces).
I have some of all the above and rue the day I bought any of them. Some folks may like those "extras" but your best bet is to leave the rifle in original configuration so it will serve you the way it did its original masters. If you need a "Sniper-configured" rifle, a Hi-cap rifle, a "special forces" rifle, a squad support rifle or a "CQB" weapon, put your money into something that was built to do those things or is more suited to them when modified. They will cost more, but you get what you pay for.
Best of luck,
H.
PS: I like the Techsights, but you still give up ease of rifle disassembly for cleaning or maintenance. That said, there's one on my Chikom and it's great for quick, accurate offhand shots.