was the M1 carbine ever issued chambered for the 45acp or was only chambered for the 30cal? thank-you for the insight,  Norman

NO, never chambered for 45acp.

This is perhaps what your thinking of though:

Between the years 1941 and 1945 there were over 6 Million M1 Carbinses produced by 10 different government contractors (Winchester, Standard Products, Underwood-Elliot-Fisher, Quality Hardware Machine, National Postal Meter,  Rock-Ola, IBM, Irwin-Pedersen, Inland of GM, and Saginaw Steering Gear of GM).

Developed as a replacement for the M1911 & 1911 A1 Service Pistol. The U.S. Military had a need to arm second line and non-combat (support) troops with a shoulder based weapon.

The M1 Carbine saw action in WWII, Korea and Vietnam.

Hope this is some help,
Mike