AR-15 – Compensator Muzzle Brake – 5.56 1/2x28 – Pegasus
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
The Ultradyne USA Pegasus is a performance-focused compensator muzzle brake for AR-platform rifles chambered in .223 Remington and 5.56 NATO with 1/2x28 muzzle threads. It uses 416 stainless steel construction, a black nitride finish, and an included timing nut for proper installation and indexing without the usual headache.
Fitment
Fits many AR-15 pattern rifles chambered in .223 Remington or 5.56 NATO with 1/2x28 muzzle threads and sufficient barrel thread length.
Does NOT fit
Does not fit barrels with a different thread pitch, inadequate thread length, or platforms where muzzle device clearance is too tight. Verify thread pitch, barrel shoulder, and caliber before purchase.
What it does
The Pegasus is built to reduce recoil and help neutralize muzzle rise with a balanced port design that supports faster follow-up shots and better control on AR-platform rifles.
Why it’s worth it
This is not bargain-bin range junk. It is a purpose-built rifle compensator with proper materials, included timing hardware, and a strong reputation for recoil control on .223 / 5.56 builds.
Specs
• Caliber: .223 Remington / 5.56 NATO
• Thread pitch: 1/2-28 UNEF-2B
• Minimum barrel length: 12 in
• Minimum barrel thread length: 0.600 in
• Material: 416 stainless steel
• Finish: Black nitride / salt bath nitride
• Mounting: Shrouded timing nut
• Length: 2.41 in
• Weight: 4.9 oz brake only
• Total weight: 5.8 oz with timing nut
• Front wrench flats: 7/8 in
• Timing nut wrench flats: 13/16 in
What’s included
• Ultradyne Pegasus compensator muzzle brake
• Shrouded timing nut
Tools needed
Use an appropriate upper/barrel fixture, vise setup, and the correct wrench sizes for the brake and timing nut.
Install notes
Proper timing and alignment matter. Confirm thread engagement, shoulder fit, and bore clearance before live fire. After installation, perform proper function testing before use.
Verify before you buy
Verify your rifle is chambered in .223 Remington or 5.56 NATO, uses 1/2x28 muzzle threads, and has enough thread length for proper installation. Also verify handguard and muzzle clearance before purchase.
⚠ Trademark & Compatibility Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by any manufacturer mentioned. All trademarks are the property of their respective owners and are used only to identify compatibility or fitment.
⚠ Install & Compatibility Disclaimer
Installation should be performed by a qualified armorer or gunsmith. Improper installation, modification, or use may affect firearm safety and reliability. Buyer is responsible for verifying compatibility, performing proper function testing, and ensuring safe operation.
