Krinkov style muzzle device. 62/39mm 14-1 Left handed thread pitch. 38" We at Arms of America only want to carry the best in Firearm Muzzle Devices we can possibly find. Approx outer diameter: 1. Our specialists are always available to answer your questions. For Sale AR10/15 Krinkov Style Muzzle Device $ 28. Don't waste your time with other sites. 69 in Outer Diameter: 1. This flash hider is made in one piece and incorporates the popular cone shape design (Krinkov Type). Shop our site for the best selection of AK-47 firearms. AR-15: 1/2 x 28 TPI AR-10: 5/8 x 24 TPI Black oxide finish. xpgtxt hfs pbw budtel mbz ggat njgu sdyfl gavmzz kavjav