SIG 716i Tread 7.62 x 51, 308 Win. I have upgraded the trigger to an 3.5 lb Rise, Rave 140 trigger. I have added a Superlative Arms adjustable gas block. Also replaced the buffer spring and buffer to run better with a suppressor. I will also include the stock trigger, gas block, buffer spring and buffer. Gun is About a year old. I have probably put 120 rounds through it. Gun is 99%.