Is there a magazine compatible with a Charles daly 22 Lr?

Armscor makes the M20P that has a magazine compatible with the Charles Daly lr field grade. I took photos of the magazine and the .22 and sent it to them.It is now the M20P, with improvements. It seems Charles Daly sold to KBI who sold to Armscor who merged with Rock Island. The magazines are 10 and 15 round.