KRYTAC M4 Receiver Pin Set
- This is an original M4 receiver pin set from KRYTAC.
- Can be used on other models of receivers.
- Both pins come with a locking screw that holds the pin securely in place.
If your hop-up adjustment is not having a big effect on the hop-up of your BBs, then it probably means that your hop-up packing is worn down and i...View full details