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Ultradyne Apollo 5/8X24 LR Compensators
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The Marksman's Review of Ultradyne Apollo 5/8X24 LR Compensators

I received my Ultradyne Apollo LR a month ago. After fitting it to my .300 Win-mag, and sending 100 rounds through it, I thought that I would post a review of this muzzle device and give my honest opinion and its performance.

so first off, when it comes in the packaging, you can tell it is a very high-quality, well-built muzzle brake. the machining is excellent and the porting has an aggressive profile with four baffles and two ports up top (I assume this is to stop the muzzle from rising). It must be noted mine came with a 0.875" timing nut and I had to purchase a 1/2x28 to 5/8x24 thread adapter to fit this brake to my gun.

After opening the packaging, fitting, and timing the brake was a cinch! the timing nut eliminated the need for a timing washer or any other pieces of hardware when installing. Just put some Loctite on it and tighten everything down!

Once at the range, the first shot was a surprise! I shot the same gun without any muzzle device (that recoil was punishing, but it is a .300 win-mag after all!) and the difference was very noticeable! It did not kick much worse than .243 or .270 and I did not notice any significant muzzle rise. However, the brake had a fireball and the concussion from the muzzle blast was very VERY strong and it rings your bell a bit. Something to keep in mind if you are wary of that sort of thing.

the brake also adds some heft to the front of your rifle, I have a 24" barreled action and the weapon's front end is considerably heavier with this device on the end. If the front-end weight is a concern, this may not be the brake for you. But if you have good upper-body strength, and are reasonably fit, this will not be a problem!

all in all, I give this a 4.8 star rating - while it does add considerable weight and the muzzle blast may be unpleasant for a lot of people (Especially if you are new to the larger caliber rifles), it cuts down felt recoil considerably enough for me to recommend it as a very good muzzle brake for any .30 caliber rifle.

Rifle specifications for purposes of this review:
Howa 1500 LA barreled action, .300 Winchester-magnum
24" no.2 pattern threaded barrel, blued finish, 1 in 10 rifling.
MDT LSS-XL Gen2 chassis
MDT SCS Stock
MDT Elite pistol grip
Vortex Viper 5-25x56
Burris PEPR 34mm cantelavier mount, 20 MOA cant
Outer Impact Picatinny rail scope mount, 0 MOA cant
Harris BRM bipod w/ Picatinny mount
Pros:
  • Quality
  • easy installation
  • cuts felt recoil considerably
Cons:
  • weight
  • muzzle blast
  • flash
Best Used for:
  • competition
  • Recoil Reduction
  • very long range precision
Would Recommend: Yes
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Last updated 2025-11-12 UTC.