Actually works, on my hellcat at least. - Griffin Armament Micro Carry Comp 1/2x28

Even after reading all the negatives for a comp on an EDC weapon, I purchased the Griffin micro carry and a True Precision threaded barrel for my Hellcat OSP.
Optics Planet had decent prices, both were in stock and they shipped quickly.
Install took a whole 5 minutes. Just swap out the barrel, put on an O ring and screw on the comp. Didn’t even use Loctite. Now all I read was you needed a 16 mm wrench. Not so. 16 does not fit, and 17 is a bit loose, but that does tighten it. A 21/32 might be perfect, but I don’t have one…yet.
Another negative I heard was it makes the weapon way too long. Well, if almost another 3/4 inch is a problem, that might be true. Just used a dremmel tool to shave a bit from my holster and it fits through perfectly.
Ran a box of 147 gr JHP through it and I didn’t go deaf, didn’t get flash blinded and didn’t get hit with dirt from the blast. What I was able to do was keep the red dot from the Hex Wasp in the window during every shot. It jumped a little, but never disappeared. Of course I was using the 15 round mags so one has a better grip.
As far as I can tell, this little gadget does it job, at least on the small Hellcat type pistol. Other writers said it didn’t do much, but they were all firing larger weapons.