The 856 is now ready to accept compact red dot sights that fit the Holosun K-footprint. The 856 T.O.R.O. maintains all the features you already loved about the 856 Defender series. A 3 inch barrel, high visibility night sights, an excellent double action trigger, and of course a class leading 6 shots of .38 Special +P on board. Now thanks to the red dot sight capability, you can zero your dot for your ammo of choice.