Got these in the post .. thanks to Liam at Air-Fective for making them exactly as per my drawings and spec. The end product design and fit is perfect and just how I wanted it all to be
These things can be tricky to make the first time without the rifle on hand and Liam has done an excellent job getting it all spot on.
It is a complete replacement shroud with no parts retained from stock shrouds with new muzzle/air-strippers (design differs between .22 and .25)
Both .22 and .25 shrouds are same length (10mm longer than stock shrouds - fits well in the case) however .22 shroud has 3 baffles & sound muffling material in it hence moderator is not really required for it. Moderator is primarily for .25 but fits .22 as well. Both shrouds are also vented at the shooter end.
This setup is a lot quieter than the stock shrouds. Sound Meter app with the phone placed one foot ahead in line of the moderator is showing:
- .22 (920fps 18.1gr) with moderator 73 DB
- .22 (920fps 18.1gr) without moderator 77 DB
- .25 (xxxfps 25.4gr) with moderator 77-78 DB
Of course this is subjective due to measuring equipment used etc and later I will do a video review of stock vs this with a proper sound meter.