HKPRO Forums banner
1 - 8 of 8 Posts

·
Premium Member
Joined
·
46 Posts
Discussion Starter · #1 ·
So I bought a "complete upper" about a year ago and put it in the safe. I just took it to the range and the student casings wouldn't extract. Didn't take long to figure out there was no ejector pin or spring in the bolt. So I ordered the pin from hkp and the spring from HK haus. Well the spring is longer and seems to have more tension than the one I compared from a different bolt. Jess from HK haus says it came straight from HK and should work but I can't get it in. On top of that, I can't even get the shorter one back in so I'm looking for opinions/tips.

Thanks
300869


300870
 

·
Registered
Joined
·
406 Posts
You're going to need an ejector tool. Never seen someone change an ejector without one. Spring looks fine.
 
  • Like
Reactions: HK HAUS

·
Premium Member
Joined
·
258 Posts
The ejector spring on a MR556/HK416 is a lot stiffer than your typical AR-15 ejector spring. The only way I could get it installed was to use a spent casing to push and hold the spring and ejector in and slide in a slave pin in the hole for the ejector pin. I used the hole in an armorers puck to hold the spent casing steady while doing this. Then I put the bolt into the Sinclair Bolt Vise and installed the ejector pin.
 

·
Premium Member
Joined
·
46 Posts
Discussion Starter · #7 ·
Thanks guys. I have ordered a bolt vise, hopefully I can make it work without launching these little pieces all over the place. I did notice the other spring was much stiffer than a typical AR spring I'm just still not sure about the length of the new one
 

·
Premium Member
Joined
·
46 Posts
Discussion Starter · #8 ·
Finally got it installed. After I was able to get it in and compress it one time the length was similar to the other one. Was a major pain in the ass and I hope I don't have to do that again!
 
1 - 8 of 8 Posts
Top