I personally don't care for the tiny fixed sights of the 1911...but that's a personal preference.
The stock TM 1911's, as said, fire great on propane...as do many of their other pistols (i.e. G17, 226, M92, 5.1/4.3). You always stand the chance of getting a lemon (they're only toys...) but TM has an excellent track record for a long time.
An enhanced (150%) recoil spring is a simple and expedient "upgrade" that you can do. A stiffer recoil spring will slow the rearward movement of the slide and take the sting out of it slamming back until it's stopped by the frame. It'll also snap forward faster...which is said to provide the opportunity for a faster follow up shot (I'm too slow and can't out-trigger my pistol anyways).
1911/226 metal kits are not all that common because the frames are prohibited items. That means that it's possible/probable/likely that customs will seize your order if it's coming across the Canadian boarder. So...DON'T order one from a foreign country unless you want to risk loosing it and being out of pocket for the money (let alone whatever records they'll keep on you that may never go away...smuggling prohibited items isn't a great resume item).
With perhaps 3 exceptions...EVERYONE I know uses propane in their GBBs, upgraded/stock/whatever. It's too cost effective, accessible and it just plain works compared to "duster". Find Airsoft Innovations' write up as to propane vs. green gas for a great analysis.
Bottom line: WE's are metal but they suck salty balls. TM's are plastic but they work and there's tons of replacement parts around. Which do you prefer?
Best of luck,
Tys
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