· Tested for 100,000+ rounds in various makes & models of the MP5 roller lock firearms shows minimal extractor failures when compared to standard bent wire springs
· MP5-E bolt head to handle +P & +P+ ammo.
· 15,000 round spring replacement recommended
· 9310 ordnance grade steel.
· The MP5-E is heat treated which reduces wear and increases longevity
· 100% US made. The MP5-E has functioned in all MP5 platforms tested.
These bolts use a proprietary extracting system, similar to what’s utilized on the HK MSG90 & HK21/21E type bolt head.