TexasCHLforum.com

I presume that FTL means it isn't loading the round or isn't going fully into battery. Sounds like a magazine spring or a dirty magazine to me.

Before hassling with service, I'd clean the inside of the magazine to make sure the follower is able to move ok, and also I'd make sure the magazine spring has plenty of tension, especially on the front side of the spring as it elongates when the magazine nears empty.

I had a Glock magazine that would not feed the last round in my G19, and I slightly tweaked (stretched) the spring and the problem went away. I also got some new magazines, which never had the problem.

I also had a Browning Buckmark magazine that was dirty from the manufacturer and the follower was binding. Rounds wouldn't even feed high enough to be picked up to be chambered. A good cleaning solved that problem. I still have to do that every few hundred rounds or so (per magazine).

Finally, I don't know if you've tried a different magazine, since these generally come with only one. Although they're pricey, a new magazine might be less than the shipping cost.