Useless, poorly designed - Ncstar Pistol Accessory Rail Adapters

Don't be fooled by the quality of the material, the flaw is by design. I installed the rail on my springfield 1911 (PX9104LP), fixed a TLR-2 on it, took it the the range, and it went limp after firing the first shot. Huge disappointment, don't waste your money. I even tried tightening the screws on the rail and adjusting the mounting bracket, still does not work.
Pros: High quality material, Installs in about a minute
Cons: Bad design, a waste of good material

This review was written in the old system and had content requirements that are different than reviews written today.