Not shiny or flashy but these thread protectors definitely get the job done. I keep several extras around because I'm always misplacing them when moving suppressors from one platform to another.
Made of high quality steel and finished in black oxide. Covers and protects barrel threads when shooting or storing without a muzzle brake or suppressor installed. Available in 1/2 x 28 and 5/8 x 24 thread patterns. 5/8 x 24 protector includes crush washer. Price is $10.99 for the 1/2 x 28 and $11.99 for the 5/8 x 24.
CNC machined high quality steel construction
Black Oxide finish
5/8" x 24 Thread Pitch, Length: 0.64", Fits AR10, .308
1/2"x28 Thread Pitch, Length: 0.5625", Fits: AR-15 .223/5.56 or .22 LR platforms