Colt Delta Elite

[realmswalker]

What parts would I need to make a colt delta elite fire 40 cal?

[ojisan]

.40 cal chambered barrel
softer recoil spring. (std. govt 45 weight? 16.5 or 18 lb)
40 cal mags for best reliability, although the 10mm mags may work so so.

FYI: If you shoot .40 in a 10mm chamber, you will get pierced primers, gas back blast and poor functioning. No need to try this. ; )