The HKs are great guns, and built to take a very high round count. The traditional double action triggers tend not to be the best, but due to the nature of the design, you can have them retrofitted with the LEM triggers, which are substantially better. The match LEM being the best of all.
It similar to having a custom Glock trigger in the HK, with a super light take-up, until you get to the wall, then a very short pull until the trigger breaks. It makes shooting the guns quickly and accurately much easier.
With LEM trigger installed, the gun retains double-action and single action modes?
