This Recoil Spring Assembly includes an integral Metallic guide rod which increases weight and durability for the assembly. The assembly also moves the balance of the pistol further forward which gives the shooter more control during rapid fire.
I've waited and waited for a new spring assembly (metel) for my PX4 storm compact what seems to be the problem, you have it for the regular PX4 ? The firearm has been out for some time now and it seems that the amount of upgrades are very limited for the compact PX4 can you tell your consumers why ?