Anyone know what type of bolt this is? Type X

[KevsterPB91]

Anyone know what type of autococker this is? I just picked this up and cleaned all the internals,pneumatics and regulator. The bolt is interesting, it appears to be a twist lock and ball bearing bolt. Anyone know what type of bolt this is and if anyone makes a derlin type. This one have seen better days.

[iamthelazerviking]

System X Type X. Stock bolt. Best to just replace.

[Ecapnation]

That's when they switched from pull pin style to that.....

Unfortunately that's unique to that body and back block.

[Psycho91]

Just get a cheap back block with your new bolt and you should be fine, it's 2k+ spec