Need new mag for my Kart conversion

I want to buy a new mag for my Kart conversion, what is available that works well?  Has to lock back.  Are the Triple K mags any good?
Thanks
Phil

PMcfall wrote:I want to buy a new mag for my Kart conversion, what is available that works well?  Has to lock back.  Are the Triple K mags any good?
Thanks
Phil

I have been using the Triple K mags. They might need some tuning to get you going but they are good mags.
By the way, nothing I have tried can get that soft shooting Wolf Match target to work in my kart.

I have a new never used Colt .22 Mag that came with my Kart Conversion (not for sale) I seen that it will work better in a Nelson than the Nelson Mags. Not liking the Nelson I decided to build my own conversion and intend to use the Colt Ace mag. They are available on ebay but for a small fortune! Friend of mine gave me a Metalform Ace Mag. I called Metalform, they no longer make the Ace and tooling was scrapped. However I was able to get Triple K Mags from Brownells. Haven't completed my conversion yet nor have I shot the Nelson so I have nothing to report on the quality of the Triple K mags. All I can say is they look good.

I have been shooting a Nelson for five years, about 200 rounds per week using Nelson mags. Never had a misfeed attributed to a magazine in that time period. 
Another possibility is the GSG 1911 magazine they work fine with my Nelson, just don’t lock back 100% of the time.

I did buy a few GSG mags. AMU epoxied a shim in the rear of the magazine to make them work better. I'm not saying the Nelson Mags will not work, I don't like the way they release the round to early.