All,

Looking for a supplier/vendor that is willing to sell "high capacity" magazines to an FFL (Type 07) in a ban state.  Most I've contacted are flat out saying they will not ship anything over 15rd to Colorado, regardless of the circumstances.  

Colorado CRS 18-12-302
(3) The offense described in subsection (1) of this section shall not apply to:

(a) An entity, or any employee thereof engaged in his or her employment duties, that manufactures large-capacity magazines within Colorado exclusively for transfer to, or any licensed gun dealer, as defined in section 18-12-506(6) , or any employee thereof engaged in his or her official employment duties, that sells large-capacity magazines exclusively to:

(III) A firearms retailer for the purpose of firearms sales conducted outside the state

Maybe find an FFL who has an account with a large distributor and have them drop ship orders to you?