GSI now offers USA MADE military side release buckles.  Made to the standard military specifications and including IR.

Unit of Measure
Items
USA MADE Foliage SR

Military USA MADE Side Release Buckles

USA MADE Coyote SR

Military USA MADE Side Release Buckles

USA MADE M Coyote SR

Military USA MADE Side Release Buckles
Material N/A Acetal
Sizes N/A 1"
Item N/A USA MADE Foliage SR
N/A USA MADE Coyote SR
N/A USA MADE M Coyote SR
Colors N/A Foliage, M Coyote, Coyote
Size Request N/A 1 in