Maybe more productive - let’s talk about the objectives, and the specific components
@JayZee is considering for his build, then objective comparison gets more fruitful.
Maybe this isn’t his particular objective - despite implying such in his first post - but most guys build P&W’s to reduce length and weight. JayZee mentioned both, and rearward balance as well.
So what particular compensator mount, QD can cap, and can is JayZee considering?
Here’s why this matters: Direct thread with a 6” can like a SiCo Omega on a 16” barrel is equivalent to a barrel 21.5” long. Typically, QD mounts on compatible compensators place the coarse threads ahead of the barrel shoulder, and typically QD endcaps add 1/4-1/2’ to the can. For the SilencerCo kit I have at hand, the brake mount and QD end cap adds exactly 5.0 ounces over the direct thread flat cap, and almost exactly 1” of overall length when installed. A 16” with the flat cap will end at equivalent of 21.5”. A 13.7” with the brake mount and QD end cape set up ends up at 20.1” equivalent. 1.4” shorter, giving up 2.3” of barrel. 2.3” of .720” barrel with .224” bore (underweight, slightly) will weigh 3.8oz, trading for 5.0 extra ounces of comp and QD cap - which in fairness, is a little underweight in this case, since the ASR brake is only 2.5”, and wouldn’t actually make it to 16.0” if P&W, so it would be a bit more than +5.0oz if it were the 2.9” it needs to be, instead of 2.5”. So in trying to cut weight and length, and move weight rearward, we actually GAIN muzzle weight choosing this option, and only reduce 1.4”, and balance moves TOWARD the muzzle, not toward the hands.
So
@JayZee needs to have a QD mount comp which has threads equal to or reflexed behind the shoulder of the barrel, and needs a can which accepts the QD threads up inside itself instead of having a LONG QD mount, otherwise, AND the comp and end cap needs to weigh less than 3.8oz, otherwise it pushes the balance forward and increases the weight of the rifle, AND the can has to be less than 5.4” in front of the muzzle, just to be only 1.4” shorter than a standard 16” with a can. Which doesn’t achieve two of the three objectives - and which gives up something around 80-100fps for that 1.4” savings. I’ve built a LOT of AR’s, literally hundreds of uppers, and I’ve not seen this particular combination.
(It will also only ever take that ONE suppressor mount type - at least without a grinder and welder involved to change the comp).
All the while, he has a perfectly good rifle set up that he loves, right now. A QD can on a P&W upper sounds sexy, I guess, but a double stamp suppressed 11.5” SBR sounds a lot sexier to me - and it’s actually significantly shorter and lighter.
I don’t know this answer - is there anywhere in the US which allows possession of a suppressor but not an SBR? I also don’t know - how many places in the US allow AR’s but don’t allow SBR’s? Maybe he’s traveling somewhere specific like this?
