If you use a 5.56 can on your LWRC 5.56 you will get back-gas/squirt-eye out of the charging handle port. I can definitively say this because I run an M4-2000 on my LWRC. Using a 7.62x51 can will get you less squirt-eye, but the sound suppression will not be quite as good. The number one negative to doing this (using a 7.62x51 can on a 5.56 gun) is that the can is heavier and longer than it ...



