I recently purchased and mounted a Daniel Defense Omega X Rail 12.0 FSP on a Colt LE6920. There were several reasons I decided to go with this rail system. I have traditionally been a carbine length rail guy but I have been looking for a long time at extended rails.
There are several high quality free-float rail systems on the market and choosing is hard. I had to look at several areas of my shooting grip and needs. I really did not what to choose a rail that would require me to ditch my front sight. I really like the standard F marked Front Sight Base (FSB). This made narrowing the rail system down to one that would allow the standard Front Sight Post (FSP) to be used. I also wanted QD points built into the rails. Quickly I narrowed down the choice to either the Omega X Rail 12.0 FSP or Centurion C4 12.0 FSP rail. Next I looked at the width of the rails. I was familiar with the drop in Omega 7″ rail and knew the width of the Omega’s was 1.90″ and the Centurion C4’s were just over 2″ at 2.1″ . The rail height was about the same on both rails. I was able to get a good deal on the Omega X Rail 12.0 FSP and jumped on it.
Daniel Defense Rail Dimensions:
More Rail Dimensions (width” x height”)
DD New: DDM4: 1.9″ x 2.165″
DD Omega: 1.9″ x 2.42″
DD M4: 1.94″ x 2.42″
DD Lite II: 2.06″ x 2.42″
DD RIS II: 2.23″ x 2.22″
LaRue: 2.0″ x 2.22″
Centurion C4: 2.1″ x 2.38″
KAC RAS: 2.2″ x 2.3″
Troy TRX: 2.2″ x 2.44″
Unlike the Centurion Arms C4 rails, the Daniel Defense Omega X rails have a proprietary barrel nut and removal of the A2 flash hider, FSB, gas system and barrel nut are required. If you do not have the tools or are unwilling to have this done, look into getting the Centurion C4 rail. The Centurion can be installed very easily without removal of most of the above mentioned parts.
When looking at my grip, I have always used my support hand to grip far forward with some of my fingers under the FSB. This had always been very natural for me and something I have always done. The lack of extended rail was the only thing limiting me from gripping right under the FSP. I also have a tendency to roll my thumb over the top rail or extend it forward along the side of the FSP. As I fire rounds, the FSP and barrel heat up and I naturally have to move back on the rail.
With the extended rail of the Omega X Rail 12.0 FSP, I can grip right at the FSP. This gives me consistency on my grip and facilitates my natural tendency to grip in this area. The extremely thin profile on the Omega X Rail 12.0 FSP gives me a positive grip around the rail. The Omega X Rail 12.0 FSP allows me to move my light in front of the FSP at the 12 o’clock position. This set up puts the light switch right next to my thumb. Once again allowing me to quickly operate the momentary on switch at my natural grip location. The light at this position also eliminates barrel shadow on the right or left side of your view, depending on whether the light is mounted on the right or left side of the rail.
Another benefit for me, is consistency in my support hand grip with the carbine and handgun. As this is my go to defensive rifle, the Omega X Rail 12.0 FSP allows my support hand grip to very closely match the distance and grip when using a handgun. Now shooting a rifle and handgun are very different, but consistent muscle memory placement while presenting the rifle or handgun towards a threat will benefit from this. I feel this is one reason I have a natural tendency to grip a carbine farther out, (under the FSP), like I was holding a handgun.
The Daniel Defense Omega X Rail 12.0 FSP is definitely a quality upgrade for me. The benefits for my particular shooting grip and weapon manipulation is a big plus. If you have a similar shooting grip style, the Omega X Rail 12.0 FSP or another quality FSP rail, like the Centurion Arms C4 12.0 FSP, might be for you. An extended rail gives you much more flexibility with, weapon handling and accessory choices for those of you who like to extend your grip at or past the FSP.