I haven't even tried it. as long as it drops free, the hardest part would be reaching up in there and keeping it level as you insert it. they leave a huge hole for the mag, so getting your fingers in there shouldn't be a problem.
Favorite range gun for the money - CZ 75B or STI Spartan V 9mm
Go-to carry setup - Walther PPS or PPQ in FIST kydex holster 1AK
Favorite .22LR - Browning Buckmark
"A Sig is like a lightsaber - not as clumsy or random as a Glock."