Description - Thread Protector with high temperature retaining O-Ring (up to 400°F) - Friction and Compression of the O-Ring retains the Thread Protector and prevents it from loosening off *Extreme rapid discharge will result in temperature exceeding 400°F and loosen the Thread Protector Shipping included in the price via Canada Post Letter Mail (untracked 5-7 Business Days). Tracked shipping (for an additional cost) available upon request. Brand: Created by Cay (Yes it's my original design) ___________________________________ What's Included - 1x Thread Protector 1/2"x28" - 1x Viton O-Ring Thread Protector Specifications - Material: AISI 4140 Steel - Finish: Knurled Matte Black Oxide (Blued) - Weight: 0.5oz (14g) - Dimensions: OD: 0.728" (18.5mm) / Length: 0.492" (12.5mm) - Weight: 0.5oz (14g) O-Ring Specifications - Material: Viton® Fluoroelastomer Rubber - Finish: Black - Max Temperature: 400°F (204°C) - Hardness: Durometer 75A (Medium) - Dimensions: OD: 0.591" (15mm) / ID: 0.472" (12mm) / Width: 0.060" (1.5mm) - Finish: Black *5/8"x24 coming soon Instructions 1. Check and make sure the firearm is unloaded. 2. Loosen off the stock thread protector or muzzle device in the counter clockwise direction. 3. Clean the thread (if necessary). 4. Install the High Temperature O-Ring over the threaded barrel. Do not overstretch the O-Ring, light pressure is sufficient the slide the O-Ring over the threads. 5. Install the Thread Protector in the clockwise direction. 6. Note that the Thread Protector can be installed in either directions. The smooth direction facing the O-Ring for more compression/friction or the cutout direction facing the O-Ring for a flush/clean connection. ***Video Instructions Coming Soon***