Tube is tube - Tdi Arms M16/M4 MIL-Spec Buffer Tubes

Seems fairly solid and light weight. My spare AR stock I wanted to use with it, fits fairly tight with little play. Installing it was straight forward, HOWEVER mind DID NOT come with the end plate pictured in the listing, which is fine for me since I didn't need it. I needed just the tube and castle nut, which luckily did come with the buffer tube. I used this with the Mesa Tactical stock adapter which came with its own end plate. With all that said, the tube just very barely seems ever so slightly out of spec in the threaded area. That may very from individual fire arms, it may fit tighter, or looser.