Basically a tri-lug mount adapter, commonly seen on most MP5s, for AACs Ti-Rant suppressors in 9mm. I had this for a good bit originally going to buy a Ti-Rant suppressor, but gave that up for something else. It has never left it's packaging when I bough it so practically new and never mounted on anything. Price is FIRM. Feel free to call or text me (Four09Three32One60Two), though texting is best for immediate response. If you do call, leave a voicemail if I don't answer and I'll get back with you ASAP. I mainly work 2:00pm-11:00pm Tues-Sat. Free Sunday and Monday. Farthest I can drive is the San Antonio, Houston, and Austin areas. I can also ship it too with added cost (just add $5 to the listed price). Thanks for checking out my ad!