Solid brace for the hk sp5 with minor flaws - F5 MFG Modular Brace System for MP5 with Cyberarm

Pros:
1. This brace locks up very tight and has no wobble to it
2. The cyberarm brace is solid and comfortable against your forearm and shoulder alike. No flimsy rubber here
3. The cyberarm brace once screwed down tight will not rotate
4. The brace has 7 adjustable positions. When fully extended the extra long length of pull is appreciated; which allows the user to easily get down low enough to use the iron sights. This brace provides the longest length of pull of any other brace I've used or looked at.

Cons:
1. Brace does not lock in the folded position. It literally just flops around while folded. There is no detent to overcome.
2. The pivot pin in the folding mechanism walks up and out every time the brace is folded and unfolded. The walked out pin snags on clothing so it is important to hammer the pin back in place when it pops out
3. When collapsing the brace, it creates a pinching hazard if your hand is not clear of the cheek rest
4. The Polymer locking lug had a small chunk missing from one of the corners. I thought that it may compromise the tightness of the lockup, but all seems well so far