Buddy loaned me an
SB folding brace until my Form 1 comes in and it has been great...but my APC is 9mm, not .45
With respect to GHM vs. APC, it's this on paper for functional aspects:
GHM - less expensive
- swappable barrels
- lower rail
- reciprocating charging handle
- charging handle only on one side
- barrel is threaded and has 3 lug
Also, Gen 1 had hollow point feed issues, but Gen 2 supposedly has that issue worked out.
APC9 Pro - Significantly more expensive
- non-swappable barrel
- higher rail
- non-reciprocating charging handles on both sides
- 3 lug only on standard model, K model has threaded barrel and ships with a 3 lug adapter
- Hydraulic buffer is a bit larger and people claim felt recoil is less than GHM
- Seems to be their current flagship model, with better support for
spare parts.
While I've shot a buddy's GHM, most of my trigger time is on the APC9 Pro, which I purchased several months ago...and I love it. Hands down my favorite firearm at the moment...but there is some bias there.
Short version, GHM is a better buy... but if money is not a concern, well, you know the answer.