Works great and doesn't need recoil spring change - Griffin Armament Micro Carry Comp 13.5x1m, Left Hand

While this might not give you absolute compensation like some others in the market...it does make it easy to do a couple of things:

1) As long as your holster is cut for a threaded barrel...this will fit it. I was chasing holsters compatibility with other ones but not with this one.

2) It doesn't require you to change out springs so saving you further dollars.

3) Compensation works...it is not as crazy as some others but it does a good job keeping you on target...especially with a red dot gun.