B&T
Factory folding left-side charging handle for the GHM9 and GHM45 that reduces the handle's stowed profile.

+5 more
B&T's BT-450076 replaces the fixed GHM charging handle with a folding factory part. Folded against the receiver, it trims the protruding control that can catch on a sling, bag, or barricade while preserving the GHM's charging function.
The fitment boundary is narrow. B&T lists the handle for GHM9 and GHM45 receivers, with installation on the left side only. It does not fit the APC9 or APC45, and B&T does not list it for the SPC9.
Add the B&T GHM Foldable Charging Handle (BT-450076) to your build and see how it enhances your platform.