If you want to get rid of the plastic front sight and add a muzzle brake or suppressor to your Kel Tec rifle then this is your solution!You send us barrel and we will cut off the front sight, thread it in 1/2x28 or 9/16 x24 to fit any AR-15, .40 cal or similar type muzzle brake or compensator. Please keep in mind that there is extra long barrel section in front of the sight shoulder that measures over 1.25 inches and we thread just the first .50" or so. Please see photos 4 & 5. Compensator or muzzle brake not included. You pay return shipping of $20.-$25 depending on weight, insurance and destination. If you send us the entire gun for this service, we charge an additional $45. to remove the barrel and install after threading and the return shipping will be higher as well. Please call for specifics.