A-Tec build modular moderators, which is the whole point of them: you add or remove modules to trade length and weight against sound reduction, on the same rifle, depending on what you are doing that day.
The ranges
H3 (Hertz 3) — the modular series, stocked here in .30 calibre, with a universal end cap brake covering 0–.375.
PRS — available as one, two or three module units, so you can start short and add.
Optima — the Optima 45 and Optima 60 front-mounted moderators, including a 6.5mm M18x1 and a .30 in 5/8in-24 UNEF.
A-Flow — the 1+2 in QD-Lock, for swapping between rifles quickly.
Wave 22LR — the rimfire moderator in standard and carbon, plus the CMM-6 rimfire in 1/2in-20 UNF.
The mistake people make: thread pitch
A moderator is bought on the thread, not on the calibre. A-Tec units in this collection come in 1/2in-20 UNF, 1/2in-28, 5/8in-24 UNEF and M18x1, among others. Read the thread off your barrel — or off the paperwork from whoever threaded it — and match it exactly. A-lock thread adaptors are stocked where a change is needed, but an adaptor is a compromise on concentricity and is not a substitute for the right thread.
Check the bore size too. A .30 moderator will happily run a 6.5, but a 6.5 unit will not take a .30.
The legal position
A sound moderator must be authorised on your firearm certificate before it can be supplied. The certificate is checked at the point of transfer, which is face to face; moderators are not despatched to a private address. If your certificate does not already carry a moderator for the calibre, that variation has to be granted first. Thread adaptors, covers and end caps are unrestricted.
Related
See also all sound moderators, thread protectors, moderator covers and rifle care.
