Short barreled rifles in 5.56mm are awesome to shoot, but they can have a lot of concussion and flash which isn't always so nice. PWS manufactures the CQB Compensator for reason. Originally designed to be used with their 7" barreled MK107, this compensator reduces recoil and sends the flash and blast forward of the shooter. This has become a popular device and is seen on a number of rifles, not just PWS's 7" rifles. Try one out, it will make it even more enjoyable to let your SBR loose.