This listing is for the Sabre in AR style thread pitches.
The braking elements were developed off of the angle of the slant brake in front of them, a design reaching back to at least the first AKM's of the '50s. It also features 4 .125" holes between the braking ports, allowing excess gas to still be utilized.
This brake comes standard with a free black crush washer, however other locking mechanisms may be purchased to fit the build you're after.
If you're interested in having something custom lasered on this product, reach out to us via the laser contact form, foundhere.