ELander Mag not seating fully in lower

[Rabbit]

I received my 18 inch hunter a few months ago. Came with 2 Aa (blue flower) mag's. I purchased several 10 and 17 round elander mag's. None of which seat completely in my lower. The bolt just passes over the next round.

Anyone have a fix other than trying to send them back?

Love the weapon. Running 30.5 grains of CFE under a 123 grain SST seated at 2.255.

[nimitzman]

Those e-landers wouldn't seat in my cmmg lower but will in bushmaster anderson and spikes. i assumed it was the lower