FYI, If you order the Geissele triggers from Rainier Arms, they will include all the different springs with your order so you essentially get all versions of trigger for the same price. This way you don't have to choose between match, service or DMR when you order:
http://www.rainierarms.com/?page=shop/detail&product_id=455
I found this before when searching for these, they had fast delivery also.
By the way, if you have a Colt, be sure to measure your pins as previously mentioned. Depending on which Colt you have, it may take the larger (.170) or standard (.154) pins. Don't assume all Colt's need the larger pins.
http://www.rainierarms.com/?page=shop/detail&product_id=455
I found this before when searching for these, they had fast delivery also.
By the way, if you have a Colt, be sure to measure your pins as previously mentioned. Depending on which Colt you have, it may take the larger (.170) or standard (.154) pins. Don't assume all Colt's need the larger pins.