This piston driven rifle has a 163n barrel with a m-lok hand guard. It has total ambidextrous controls including a side charging handle. It comes with a 20rd magazine and a 1913 adaptor on the back.

PRICE IS FIRM!

https://www.summitarmory.net/new-in-store-guns/ar-10-pistols-93-3207/sig-sauer-mcx-spear-13-762x51-4655404