There are many lengths of screws and you must be careful not to use too long a screw, which might rub on your firearm. Otherwise, the kit is very inclusive of all needed parts (more than enough, really) and is easy to use.
Pros: very flexible for multiple positions
Cons: take care to not use screws that are too long
This review was written in the old system and had content requirements that are different than reviews written today.