Now I'm delving into NV I need a 10 shot magazine for the annie as having to reload every 5 shots is a pain so one of my spare CZ 511 mags is up for sale. As I found out the CZ511 mags will fit the 581 but not the other way around as the end cap of the mag comes up higher on the 581 and stops the mag going deep enough into the well for the mag clip to catch. I reduced the end cap with a dremel to get over this and it is now a solid fit and cycles fine.
The modified mag for sale
Compared to a factory 511 mag
Compared to a 511 vs 581 mag showing difference in height of end cap
Price is £25.00 posted 1st recorded, payment by paypal