knights ff ras fit 308 ar?

[benfur]

Will a knights armament free floating ras intended for an ar-15 work on a dpms 308 upper? Looking to do a spr mod 1 build but in 308. Can this been done

 

[purdue_para151]

I don't think the 5.56 model is gonna work. Knight's makes a 7.62 model of the FF RAS that was used on the Mk11 rifles. SR-25 RAS Free Floating Barrel Knight's Armament Company SR-25 RAS Free Floating Barrel [P/N: 20362-1] - $506.66 : Knights Armament, ::Welcome to our Online Store

 

[benfur]

Is the 5.56 model to small? Does anyone know from experience. That it will not work

 

[purdue_para151]

5.56 model is definitely too small. The barrel nut and receiver threads are much larger on a .308 platform.