INtersting responses, many thanks. To clarify I was looking more for the modified 223 case system rather than the replacement bolt assembly type system but will probably buy and play with both once I find out where to get them.

MARK

LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.

About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500