The links are worth about $70 or so per k, because they are the shouldered type for the 1919 and not the more universal "Israel" type that can be used for various calibers. A delinker can be made but I'll be honest they are probably worth more linked.
The 1919 uses a BFA that is very open at the muzzle, using these in other guns with a BFA in place may cause you to wear the gun on your face. I'm not super familiar with this particular iteration of blanks as I mostly use .308 DAG now.