Either of these will improve your usage of the bolt release. Neither of them protrude any significant amount, the magazine-well and magazine take care of that.
The aggressive bolt release will give you great texture and almost impossible geometry to slip off of. However, it does create a snag hazard.
The enhanced is slightly enlarged and textured.
For you weirdos that care about 1-2 grams of weight, the aggressive adds 2 grams and the enhanced adds 1 gram of weight. The stock bolt release is 6 grams.
**Buy one type, get the other for $10 off. Just add both to your cart.**
Due to the nature of the product, and being a one man show, any sort of warranty will be handled on a case-by-case basis.
