This includes a retention holster for your pistol; mine is a Safariland 6378 at 3 o'clock on a DFA with the leg strap mod here:http://www.itstactical.com/gear/secure-your-safariland-6004-for-mid-ride/
I can't +1 this mod enough. I did the same for my M9 and have never looked back. The stability of a drop leg with the comfort of a hip-mount. If you do it right, you center it right at your thigh's pivot point so your hips bear the weight and not your leg, thus less leg fatigue when moving fast/long. Plus if you do don a PC, it's low enough that your draw won't be obstructed by the sides, especially if you have side SAPI's.