These are useful for timing (positioning) muzzle devices if you want to be able to adjust the position without using crush washers. With a wrench or two you can adjust your muzzle device multiple times back and forth until you find the right position. So it's like having a reusable crush washer. Colour varies but generally the Chunky style are gunmetal gray while the Slim style are darker, nearly black Use it to time a muzzle device if needed You don't need the crush washer if you are using this unless you're a belt-and-suspenders kinda guy Chunky-Style specs 13g (1/2" version) or 10g (5/8" version) 0.75" wrench flats 24mm (0.947") diameter on the round area 6mm (0.238") thick Slim-Style specs 10g (1/2" version) or 8g (5/8" version) 0.75"wrench flats 22mm (0.863") diameter on the round area 6.3mm (0.247") thick You get: (1) Jam nut of the specified size and style Compatible with: All barrels with 1/2-28 or 5/8-24 threads Installation Difficulty: Tools required: 3/4" wrench Installation notes: Gett'er done, tighten it against the muzzle device to effectively lock the device in place
Brand Name : None
Distributor : Truenortharms.com
Distributor Product ID: 4707
Distributor SKU: 688737046542-1
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