Any of our adaptors will fit OEM Sig barrels in the proper thread pitch. These adaptors have been revised to fit both SIG and NON Sig barrels. The 13.5x1LH are all face mount.
The Canik is a 1/2x28 threaded barrel.
The Griffin Armament Micro Carry Comp will fit MPX models (MPX-K) that utilize 13.5x1 LH threads.
If the APEX 509C barrel is threaded for M13.5x1 LH it will fit. However, from what information I could find you will need the Griffin Armament Micro Carry Comp 1/2x28 model at the link below.
https://www.opticsplanet.com/griffin-armament-micro-carry-comp-1-2x28.html
Yes. The HK VP9 Tactical uses 13.5x1 LH threads, so this Griffin Armament Micro Carry Comp would fit and function as intended.
No. The Griffin Armament Micro Carry Comp threads on just like a thread protector and does not require any timing. It functions as intended due to relief ports being located on equal sides all the way around the compensator.
No, the M&P would have 1/2x28 thread pitch.