Machined and properly heat treated from ordnance grade steel.  A definite must have item that is used in conjunction when using a suppressor and 147 grain or heavier ammunition.  Each 80 degree locking piece for the MP5K-N or MP5K-PDW models.

For these platforms:

• MP5K
• MP5K-N
• MP5K-PDW
• SP89
• Other custom builds or clones