Genuine Glock factory thread protector for G21 Gen 4 in .45 ACP. M16x1LH left-hand threads. Maintains barrel integrity when suppressor not in use.
Fits: Glock 21
This is the genuine Glock factory thread protector designed specifically for the G21 Gen 4 pistol chambered in .45 ACP. It features M16x1 left-hand threads that match your barrel's specifications precisely.
If your G21 Gen 4 features a threaded barrel, this protector serves an important role. It keeps the threads clean and protected from dirt, moisture, and accidental damage. When you're ready to attach a suppressor, simply unscrew the protector and install your suppressor in its place.
This is a straightforward, essential accessory for any threaded-barrel G21 Gen 4 owner.