I have been working up two setups on my XCR keeping the receivers the same. I figured I would take advantage of the XCR's modularity. The first pic is of my basic patrol rifle with surefire G2 LED in a Larue mount with a Larue FUG. The barrel is the light barrel, shortened to 14.5 with the FSC 556 permanently affixed. The pistol grip is Magpul MIAD.

The next pic is my patrol rifle with the clone magnifier in place. The Larue mounts are at a perfect height for me and work great with the magnifier and zoom dot.

Up next is my SPR rig, Burris 4.5x14 scope, 16 inch heavy barrel. No VFG or light to travel lighter. I figured I would use this configuration on observer missions or woodland searches where the scope will be a plus.


I got the new barrel and bolt yesterday. I probably didn't need to match a barrel to a bolt, but I wanted a spare bolt anyway. I zeroed the Burris scope and the heavy barrel, and then switched back to my patrol setup as I was a little rushed and did not get to really wring it out.
I went back to the range today to test things with a little more time and detail. The good news is that I cannot shoot well enough within my limits and the limits of the ammo to see a difference in zero. I removed my patrol setup and test shot the SPR setup. It was still good to go.
I then mounted the Millet and the magnifier and shot some groups. The elevation was dead on and the windage was 6 MOA off but the optic was zeroed to a different barrel. When I mounted the short barrel, its group was spot on at 50 yards as it was before being removed and replaced twice in two days. Very good news.
Overall, I feel comfortable in switching between barrels and optics and that they will retain their respective zeros. It takes two minutes or so to switch configurations, so it is practical to switch depending on missions. Worst case, I have to go with my patrol configuration for everything active and I know its capabilities. The patrol car carries all the weight so carrying two barrels and optics is not big deal. No all I have to do is find a hard case to store the barrel, bolt, optic, and barrel wrench in.
Now for the bad. Right now, the short light barrel is grouping smaller than the longer heavy barrel with the same ammo. I don't know if the new barrel isn't broken in or what the difference is. I may order another FSC brake as my groups got smaller on my DPMS .308 and my XCR when I added them. I like them so having one on the heavy barrel won't be a big deal. Even though the groups aren't as small, yet, with the heavy barrel, the group showed no signs of opening up with larger round counts. The light barrel doubles in group size for me at 7 to 10 fairly quick rounds.

The next pic is my patrol rifle with the clone magnifier in place. The Larue mounts are at a perfect height for me and work great with the magnifier and zoom dot.

Up next is my SPR rig, Burris 4.5x14 scope, 16 inch heavy barrel. No VFG or light to travel lighter. I figured I would use this configuration on observer missions or woodland searches where the scope will be a plus.


I got the new barrel and bolt yesterday. I probably didn't need to match a barrel to a bolt, but I wanted a spare bolt anyway. I zeroed the Burris scope and the heavy barrel, and then switched back to my patrol setup as I was a little rushed and did not get to really wring it out.
I went back to the range today to test things with a little more time and detail. The good news is that I cannot shoot well enough within my limits and the limits of the ammo to see a difference in zero. I removed my patrol setup and test shot the SPR setup. It was still good to go.
I then mounted the Millet and the magnifier and shot some groups. The elevation was dead on and the windage was 6 MOA off but the optic was zeroed to a different barrel. When I mounted the short barrel, its group was spot on at 50 yards as it was before being removed and replaced twice in two days. Very good news.
Overall, I feel comfortable in switching between barrels and optics and that they will retain their respective zeros. It takes two minutes or so to switch configurations, so it is practical to switch depending on missions. Worst case, I have to go with my patrol configuration for everything active and I know its capabilities. The patrol car carries all the weight so carrying two barrels and optics is not big deal. No all I have to do is find a hard case to store the barrel, bolt, optic, and barrel wrench in.
Now for the bad. Right now, the short light barrel is grouping smaller than the longer heavy barrel with the same ammo. I don't know if the new barrel isn't broken in or what the difference is. I may order another FSC brake as my groups got smaller on my DPMS .308 and my XCR when I added them. I like them so having one on the heavy barrel won't be a big deal. Even though the groups aren't as small, yet, with the heavy barrel, the group showed no signs of opening up with larger round counts. The light barrel doubles in group size for me at 7 to 10 fairly quick rounds.