Heres an STC 1911
http://www.practicalpistoluk.com/ppu...thread_id=1018
A cheaper option is have them supply a Umarex with tuned hammer, slide and trigger like this CP88 they supplied me with last month
http://i90.photobucket.com/albums/k2...n/DSC06062.jpg
http://i90.photobucket.com/albums/k2...n/DSC06068.jpg
Tuning IRO £45 extra
Link
http://www.shootingshow.co.uk/index....tors&Itemid=72
One good place to get an idea of what can be done and is available if to get along to an IPAS meeting - lots of tuned and customised multi shot CO2's to see there. Matches advertised here:
http://www.practicalpistoluk.com/ppuk/forum/index.php