Your Browser is OutdatedQ&A for Ultradyne Apollo Max Compensator — 61 Questions & 61 Answers
For the 6.5-300 Weatherby we would actually recommend our 6.5 Apollo LR. Our Apollo LR series was designed to deliver the same outstanding recoil reduction as our MAX line while withstanding the higher pressures from a round like the 6.5-300 Weatherby. Please ensure your barrel is threaded 5/8 X 24 as we have noticed Weatherby sometimes offers 1/2 X 28 even in these larger calibers.
Ultradyne requires at least a 16" barrel for safe operation of the Apollo Max due to the extreme angle of the side ports ejecting high temperature, high pressure gases that can injure shooters. Please ensure to follow required specifications while operating in conjunction with Ultradyne products.
We have not experienced any successful uses of a bayonet over the Apollo Max. The Apollo Max features a maximum outside diameter of 0.975".
The Apollo Max .308 should be a great fit for your Henry 30/30 in 5/8 x 24
The Apollo Max .308 is not rated for the corresponding pressure of the 7mm Remington Magnum. You would need the Apollo LR 7mm: https://www.opticsplanet.com/ultradyne-ud11180-6-5-apollo-lr-compensator-5-8x24.html?_iv_code=3HE-RMC-CMMG216-UD11240&_iv_caliber-193146313=7mm-remington-magnum
The Zastava M77 / PAP M77 rifles chambered in .308/7.62×51 typically use M14 × 1.0 left-hand (14×1 LH) muzzle threads on factory barrels. These would not be compatible with the Apollo Max- please check out the Ultradyne Vostok.
Yes, 300 Blackout requires a 0.308" bore diameter .308 muzzle devices will work.
The Apollo Max 6.5/.264 should work perfectly for your rifle chambered in .243
FN SCAR 17 / 17S (7.62×51) factory barrels are threaded 5/8″-24 TPI (the common .30-caliber muzzle thread). You should be good to go with the Apollo Max .308
FN SCAR 17 / 17S (7.62×51) factory barrels are threaded 5/8″-24 TPI (the common .30-caliber muzzle thread). An adapter is likely not needed to be compatible with the Ultradyne Apollo Max .308