SuperComp® XL 308 - 30 CAL 5/8 X 24 TPI
*PATENTED HEX SSP™ STAR STABILIZING BLAST PORT PATTERN
Materials: 
Chrome Moly 4140  RH 28-32 Prehardened 
17-4 Stainless Steel 32 HRC
Grade 5 6/4 TITANIUM 30 HRC
Coatings:
Parkerized (deep grey) - 4140 only
Black Nitride Finish - 4140 and 17-4 SS
Blast Finish (silver matte) -17-4 SS and Titanium 
DLC Diamond Like Coating (dark tactical grey)
Standard Features:
Thread: 5/8 X 24 TPI
Length: 2.996″
Diameter: .996″
*HexSSP(tm) SuperComp(r) technology licensed from Grip Holdings LLC.
US Patents  US D666,687- US D692,086 – US D711,491