If the POFs are the all plastic, they should snap over your your receiver. The metal ones, which the POFs may be, might be a bit tighter and will probably marr the finish, but if you put it on once and leave it one, who cares? I suspect it will be snug and may take a rubber mallet to seat it good.
As pointed out, if you see that raised portion just forward of where the butt stock attaches, that is in essence the "extra" thickness your cast receiver has for all forward areas on the receiver. So your gun will take regular stocks and some after market stocks as well, but will not work well with a collapsing stock. Folding stock like Choate makes, will probably work. I no longer have a Cetme to try it on. It has been some time since I owned mine. Since your trigger group (lower) is a factory item, any accessory that attaches (like pistol grips) will work since it is HK spec. Forward hand guards will all work as well.
Post a pic of the whole rifle! Let's see your beauty.
Last edited by Crackerjack; 04-04-2018 at 07:00 PM.
Howdy. I just joined this group because I was reading all this, I just got a clean cetme parts kit today with a apex barrel and a NOS century cast stainless reciever. And it is nice. At first I was afraid it was one of the aluminum flops until I stuck a magnet on it. Basically got the reciever for free too. Its cast tough. I can't wait to build it. It will be my 3rd build, and I'm going to use this reciever as a guide for making my weld jig too, the added thickness will help there. I'm sick of welding on sights and having to cut them back off cuz I welded em crooked. Drives me NUTZ. Anyways I ramble. Like to see some pics of that rifle too.