P556® Pistol features a 10” button rifled barrel, chambered in 5.56mm NATO, with a twist rate of 1 in 7”. The flash suppressor uses a standard .5 x 28 TPI thread pattern, ensuring compatibility with after-market accessories.
If you would like to find out more about the Sig Sauer P556 Classic Pistol w/ Pistol Brace & SIG Red Dot Scope you can find the listing HERE
