I sent in my paperwork to the ATF for a Gemtech GM-22 suppressor today for my M&P 15-22. Got a decent price ($325, MSRP $395) and the local dealer provided all the paperwork other than taking photo's for the Form 4. Got the pictures taken last weekend and had the local police chief sign off on it a few days ago. Since I'm a police volunteer, he was happy to do it and is considering one for a hog rifle himself. He asked how long it's taking these days and I said I'm not sure but if it's like the SBR I built a few years back, probably 7-9 months. Since I also submitted the SBR paperwork in May and received the stamp just after Christmas, we'll see whether this stamp takes less time or more. Anyway, has anyone recently received a stamp for a suppressor/silencer and how long did it take the BATF to return the paperwork?