The Intratec Tec-22 Scorpions have a barrel with a thread pattern of 1/2-20 TPI. Our adapters have a 1/2-20 thread pattern on one end and an 1/2-28 TPI on the other end.

Now all the AR-15 muzzle brakes with the 1/2-28 thread pattern can be added to the Tec-22 with 1/2-20 threaded barrels.

Blued steel, adds 1 inch to the length of the barrel and adds approximatly 4 ounces to the weight of the Tec-22 firearm.