Great fit and enhances performance. - SB Tactical HKPDW HK Brace for HK MP5/HK53/MP5K

I installed this brace on a new HK SP5. It's a very tight fit and it took lubricating all surfaces that the take down pin comes in contact with and the use of a wooden mallet. I expect this will loosen up a little in time as cleaning are done on the gun.
It's an expensive brace but is extremely well build and the 3-position characteristic was important to me.