9mm 1/2 x 28 Threaded barrel protector. It is machined from US made stainless steel to very high quality standards on CNC lathes in my shop. It is counter bored to accommodate barrels that are not undercut at the shoulder.
Length is .460″
Outside diameter is .640 With a clean crisp knurl.
Fits Lone Wolf Aftermarket Threaded Barrels and other brands with a 1/2 x 28 thread.
For Glock models 17 19 26 34 and many others
Please confirm your thread size before ordering.