Sp5 brace application - SB Tactical HKPDW HK Brace for HK MP5/HK53/MP5K

The brace is very well built, and once installed is a perfect fit for my SP5. It may be a little short on extension for some, but I found it to be comfortable and emencly improves my fire control. The reason for four stars instead of five is because the nylon slide inside the receiver coupling conflicts with a steel tab in the SP5 making it impossible to connect the two together until you realize you need to cut a small part of the nylon slide off in order to make it fit. Since the nylon fixture controls the slide extension, you have to be careful not to cut too much off. Nothing in the direction sheet advises you of this problem, but once done, the system works very well and functions like it was part of the original SP5 system.