03-16-2012, 05:49 AM
I heard that you could use a Magpul 20 (5.56) round mag for Grendels, I have been trying it out in cycling the action and watching the rounds eject. I am very new to Shooting a Grendel, but this Saturday I will be trying it out. I'll let you know. I hope it does, as I like the magpul magazine releasing better than metal mags
