The MECH-TECH is a wonderful little play thing. I absolutely LOVE mine. I won't tell you where it is right now, but it's not far away.
The "sproing" is there, but they do have a nice Walnut stock filler for it that helps.
My favorite thing to do is.. let someone shoot it. The look of wonder and delight after ripping off a mag is just priceless. I think my local dealer should start giving me a commission.
I moved an EOD HALO to mine on Thursday so I needed to resight it. A lady I see at the range all the time stopped by to say Hi. She took one look at it and had to try it out. That grin was un-real. I know what SHE is getting for Christmas.
I put a Kimber Polymer under mine. Everyone sees it and says, "Wow. What a great idea." But, unless you just happen to have a Hi-cap .45 laying around, its not that big of a deal to have under the CCU. Think about it. Hi-Cap mags for those frames run anywhere from 80 to 120 bucks. That is to get 13 or 14 rounds in the frame. I can use a standard 1911 frame with 10 rounders just as easy. And for that same 100 bucks, I can get 5-10 round Shooting Star mags. 14 rounds.. or 50 with quick changes for the same money.
I had this polymer that was the most un-reliable gun I had ever SEEN! But under the CCU, it has been flawless. I already had the hi-cap mags, so for me, it was a good fit. YMMV.
Bottome line, are they worth the $300 bucks? Oh YEAH!
Bubba