With the limited use I've given my V3, never noticed any POI shift or accuracy issues on anything other than the little JW-103 7.62x39 and that was only before I bedded the thing properly. Most of my suppressors weigh more than the V3 as a point of note. One serious advantage of the Labradar and Garmin devices is you can use them on big arsed overbore magnum rifles fitted with F-U (and your ears plus eyes when shooting over pumice) radial loudeners. I've made up a little shield that clamps on with circlips to divert (for a second time) the muzzle blast out of the radial break back up and forwards and away from the vulnerable bits on the V3 but it still needs a clean afterwards. Makes a difference to the recoil you feel too...
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