Ap5m
This does not fit directly on an ap5m without significant modification (dremeling). That said it is light and tough and the curved handstop let's it hang off of hooks and gives you options for storage/keeping handy. I'm sure it is a perfect fit on the sp5. It is well made and has put up with my grinding one it to clear the front sling hook and is definitely an option if you have a thumbburner without the extended muzzle. All my orders from Haga defense have shipped extremely fast and the decals they send are awesome.