Here is what you need to convert the cx4 to accept the px4 mags. Included are the magwell insert, mag release button and a lnib 15 rd mag. I got this cx4 slightly used and immediatly converted to run with my cougar. Mag looks new, I didnt use it marked,MDS made in Italy. The metal tab(mag catch) in the button had one crner worn from me trying the cougar mags but didnt lock good so I took it out and got the correct cougar button. I turned the tab over and good as new. Will not seperate.First I'll take it gets it. A bargain at $55 postal money order shipped,

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