Description
H&K Heckler and Koch New +4 roller for HK MP5 40/10
Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production.
Please Note: The price listed is per roller. Order a second roller for a complete set for the bolt head.
An easy way to remember the size you need to order – plus-size rollers increase the bolt gap and minus-sized rollers decrease the bolt gap.
