For a larger view and more details on the threads just click the picture Beretta 92 9mm Threaded 1/2×28 10/22 w/ Flush Protector 10/22 Thread 1/2×28 H&K USC 45 w/ Knurled Protector H&K USC 45 9/16×24 Knurled FNAR 308 w/ Gemtech HVT FNAR Thread 5/8×24 Savage M40 Threaded 1/2×28 Savage M40 Knurled Protector Savage 308 HS 5/8×24 Savage 308 HS 5/8×24 Kel-Tec SU16 Alpha 1/2×28 Kel-Tec SU16 Alpha Threaded FN PS90 Threaded FN PS90 Threaded 16″ FN PS90 Threaded 16 inch PS90 Threaded