Check the listing for details. Micro Muzzle Brake LongShot MINI-BRAKE for .578-28 TPI Solid BRASS 1911. Condition: New. Listed at 26.95 USD. This listing is for one of our minimalist MINI-BRAKES for .578-28 threads (also known as 37/64-28) which are the standard thread size for any MIL Spec 1911. These micro sized muzzle brakes are CNC machined from solid Brass bar stock and weigh only 28 grams.This MINI-BRAKE Thread Protector is specially made for .578"-28 threaded barrels and WILL ONLY FIT .578-28 size threads. It WILL NOT fit .578-24 threads.Measurement across the wrench flats is 17mm. These particular muzzle brakes measure .740" OD x .915" long and are designed for thread lengths of .460" or shorter. They do not require use of a crush washer. These look great, minimally vent recoil gases outwards to the sides and give your gun a uniquely custom appearance. (other style and versions in Stainless Steel and Anodized Aluminum are available in our other Ebay listings) All of our products are made to perfectly the applications they are specifically designed for. Our products are incredibly well made and function even better. Look us up and read what everybody says about our wide range of LongShot products. WE MAKE EVERYTHING IN OUR OWN CNC MACHINING FACILITY, RIGHT HERE IN THE USA. We are LongShot Mfg and this listing is for one of our NEW .578"-28 Mini-Brake threaded end protectors for threaded barrels that have a .460" long right hand thread.Additional LongShot products can be purchased directly at our website. We currently produce over 700 different items made to perfectly fit various firearm models and brands.Yes, our products have been approved by the US State Dept of Commerce for international shipping to most countries. Sorry that the additional International Shipping costs are so high. International shipping costs are determined by the US Post Office and beyond our control.We accept Paypal Only . Most of our items ship within 3 business days and arrive at your door approx 4-7 days after that. If you need it sooner, please contact us directly and we will do our best to accommodate your needs. This listing is for one LongShot solid Brass MINI-BRAKE for .578-28 Right Hand threaded barrels only. Any other items shown in photos are for display only and are NOT included in our listing.Sorry that the additional International Shipping costs are so high. International shipping costs are determined by the US Post Office and are beyond our control.