What's the fix for a carbine that ejects consistently to the forehead?
Thanks
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What's the fix for a carbine that ejects consistently to the forehead?
Thanks
hard hat
Yeah, I just wear a regular baseball cap. Seems to work out ok.
Dennis?
It's your Ejector more than likely.
Ideal one would be a flat faced cone, with well defined chamfered edges all the way around.... called a type III.
I just shot a NPM out at CCRC with my son that day, you were showing new members around. (Orientation)
My NPM has a Type II, it's much like the Type III but not as heavy of a outside bevel or (Chamfer). It's worn and I ended up with the last 8-10 mags we shot going off the forehead.
Cheers,
Charlie-Painter777
Yes, Charlie, it is Dennis. Thanks for the replies and suggestions. I have tried switching from the multi-faceted ejector to the outside bevel or chamfered. It had no affect. I will try using a type4/5 op rod instead of the type 2 and see if that clears it. I'll let you know if it works or what eventually does work. Dennis
That would be nice. We seldom get feedback once the situation is remedied.
I had one where I had to use the late ejector and late slide to keep it from hitting me. The late slide should work.
If the ejector is moving freely in the bolt I would change the extractor and see what happens. If the extractor is worn or broken and not holding the side of the case rim long enough it might cause the case to come out straight to the rear. Wouldn't take much to try it and see. JMHO
Changed the extractor, changed the slide from a type 2 to type 5 and headed for the range this afternoon to see if it works. I'll let ya'll know later.
It worked. The angle of ejection has changed. I do have a type 3 ejector coming and will try that with the old slide. If it works, the type 3 ejector's the answer. If not, then the need for the type 5 slide. Thanks for all the replies and suggestions. Much appreciated. Dennis
If you are going to change things around and try different combos, you might try the original extractor and make very sure that the plunger is installed correctly. This could have been the original issue. A lot of carbines have the plunger facing the wrong way and not resting on the extractor shelf. The ejectors themselves have some effect on case flight but it isn't as radical as one would expect. I've changed from a type 1 to a type three and noticed no change. Then from a 3 to a 2 and it solved the issue barely. Having the carbine well lubricated has some (actually a lot of) effect as well. I put a lot of grease inside the cam area of the slide where the bolt lug lives, this makes things a lot smoother in operation.
Received the type 3 ejector (flat face) from Bill Ricca. Replaced the type 2 slide, original extractor and the type 3 ejector. Fired 15 rounds all of which ejected at 4-5 o'clock. No failures of any type. The type 3 ejector's the answer. Dennis
Thanks for the feedback.
Charlie: I re-installed the original extractor which I'd inspected carefully and found to be without any problems. I initially replaced it with another just to see if it might affect ejection and it didn't. I will remember in future to also consider the extractor as a potential cause. It shoots well. It's an Underwood "T" which went through Anniston depot rebuild. Looks to contain mostly original parts with the exception of a potbelly stock. The carbine was probably obtained through DCM. Dennis
I agree with you regarding greasing the op rod guide lugs and cam areas. The carbine op rod is notorious for wearing particularly at the rear tab. This is the most frequent cause for replacing the op rod. I've found, instead of replacing the op rod, having it rebuilt. Greasing the channel significantly increases the life of the op rod. Grease is your friend. When I started working on this carbine, there was no grease. I did grease everything when I changed from the type 1 to the type 2 ejector and as I mentioned, it didn't change the ejection pattern. I then changed the extractor and the type 2 op rod for a new extractor and a type 5 op rod and this did change the ejection pattern to 3-4 o'clock. When I received the type 3 ejector, I replaced the extractor and type 5 op rod for all the original parts with the exception of the new type 3 ejector. The ejection pattern remained at about 4-5 o'clock for 15 rounds. Maybe it was the grease.
I forgot to qualify my comments regarding grease, I use it "sparingly".