Cz-527

[Hooz]

I have 527s in 7.62x39, .204 Ruger and .223 (now .300 Blackout) and all the magazines are different. The feedlips are slightly different on the 7.62x39 mags, but the big difference is that they have ridges pressed in to the sides of the mags. The ridges sit just in front of the shoulder of the cartridge to keep the rounds stacked nicely in the mag. Each magazine has slightly different ridges to accomodate the different rounds.

You can kind of see the differences in the mags in this picture:



Just to clarify, I had to mill the ridges out to use the .223 mags with 220gr 300 BLK subsonics, like this:



Hand cycling Grendel rounds through the 7.62 mags works perfectly. I can't imagine having to mod them much, if at all.

If you start with a 7.62 527, converting to 6.5 Grendel is as easy as a barrel swap. Now that my Blackout conversion is done, the Grendel conversion is next on my list.