Those are all crap. They don't do anything my $15 Gerber Paraframe from Walmart won't do. Y'all are just throwing your money away.Cold Steal sucks, I wouldn't give them a dime. Design stealing
Heavy duty one handed opening knives: Zero Tolerance 0301, Zero Tolerance 0561, Hinderer XM-18, Hinderer XM-24, Strider SnG, Strider SMF, Medford Praetorian, Grayman Satu, Grayman Dua.
Fastest opening folder hands down with a Titanium framelock that if someone can manage to break they deserve a dumbass of the year award lol.
https://zt.kaiusaltd.com/knives/knife/zt0630
Heavy duty one handed opening knives: Zero Tolerance 0301, Zero Tolerance 0561, Hinderer XM-18, Hinderer XM-24, Strider SnG, Strider SMF, Medford Praetorian, Grayman Satu, Grayman Dua.
Cant go wrong with any of these. Other than the ZTs and Dua you are probably looking at doubling or more the $200 mark that was set. Medford has the 187 line that comes in at $425 rather than the $600+ for a Praetorian. In a similar price range of these I saw Chaves is doing preorders for another run of 228 midtechs.
FTFY.
Owning both a 630 and 620 I'll tell you the wave feature works much more reliable on the 630 than the 620. It has to do with the blade shape I think and the way the back of the blade curves inwards slightly on the 630 that draws the material into the wave. The 620 works fine too but it has less of a ramp on the back of the blade and has to be pulled at a more rearward angle to open reliably. The 630 can be pulled straight upwards and open almost every time. My 620 fails about 70% of the time unless I'm drawing it rearwards quite a bit.
You need more practice with the wave young grasshopper. Emerson no fail you, you fail the Emerson.
Joking aside
Honesty Medfords are not really in the category of "open easily" knives even Greg Medford says he designs most of his knives to be opened with two hands.
Kershaw cryo. Mine's been used and abused for several years now. Just can't say enough good things about it.
Seriously, the OP wants a nice overbuilt knife that can be easily opened with one hand for around $120 and you recommend a cheap $25 made in China knife?
Hmm.... This one's interesting. Think a liner lock could be strong enough like this? Zero Tolerance ZT 0909 KVT, S35VN STONEWASH, G-10 https://www.amazon.com/dp/B01B81Y8TI/ref=cm_sw_r_cp_awd_.u51wbQ9GPG6S
You should also check out the.....MICROTECH STRIDER SILVER.