Sig P320 PCC with Matador Arms Mag X P320 Range Test
This video tests the Matador Arms Mag X P320 adapter, allowing Sig P320 magazines to be used in an AR-15 lower with a 9mm upper. The adapter performed flawlessly across a wide range of ammunition weights (90-158 grains) in terms of feeding. While last-round bolt hold-open was not consistently achieved, the adapter is presented as a viable solution for training or cost-effective shooting.






