February 23, 2018, 04:21:55 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: If you're a game moderator and don't have the "Game Organizer" custom title, please PM
   Home   Help Search Login Register  
Pages: [1]
Author Topic: Retaliator Plunger Tube Lip Problem  (Read 142 times)

Offline Offline

« on: December 31, 2017, 07:37:30 PM »

So I was modding the Nerf Retaliator (just a simple lock and AR removal as well as and installation of the OMW stage 1 kit), and when I did the test fire, the gun wouldn't catch! At first I thought it was the catch spring, but after some troubleshooting, this clearly wasn't the case. I finally found a post explaining my situation pretty well. (Here's the specific comment.)

Aha! Finally found the issue. The locks weren't it; it would resist regardless of if I had the bolt lock in. For some reason, inside the plunger tube, there's a small lip of plastic with an ever so slightly reduced ID that extends maybe a centimeter into the plunger tube. Normally, the lip appears to be enough for the O Ring to catch on, and have the plunger stop. My issue comes in that after being shot (or with any spring pressure), the O Ring will force itself into that reduced diameter area, resisting any push to get it to move out. I can only assume it doesn't do this on stock blasters as the AR provides enough cushion to stop the plunger head. No idea how we're going to fix this now, but at least we know the problem...

EDIT - Went back to look at the guides again, and SGNerf describes the area in his "Special Notes" section. I was considering just lubing it to hell and back to let it do its thing, but as far as I can tell, the O Ring isn't supposed to go past that lip. Why mine is, still don't know.

EDIT 2 - Apparently the buffer created by having a loaded dart (and not simply dry firing) is actually enough to stop it from jamming onto the lip. Interesting.

They mention that the buffer created by a loaded dart is enough to stop the issue, however, that wasn't the case for me. I could order an entire new Plunger system, but I don't to spend any more time or money (at least not anything above $15). What are my options? Also, sorry for no photos, I'm new to reddit and haven't done all the imgur stuff. And sorry for typos, if there are any, I accidentally deleted my original post and am in a hurry to write this one.


Interstellar Caveman

Offline Offline

« Reply #1 on: January 28, 2018, 09:08:40 PM »

The reduced diameter is at the very front of the cylinder. The O-ring wedging into it, which is quite a tight fit, absorbs some of the kinetic energy from the piston in a dryfire, and helps prevent piston damage. This feature will not cause failed catch engagement. It is at the opposite end of the stroke from the catch. The greatest consequence it may have is more difficult cycling after a dryfire, which is normal, and not indicative of a problem.

If the catch does not engage the piston, the bolt carrier is binding or hitting something and preventing full bolt travel, or the piston or spring are binding and preventing full piston travel, or the webbing in the front of your piston has been crushed by repeated impact from the end of the bolt on cycling, thus losing sufficient piston travel to catch (install flat shim over webbing to repair), or the catch is binding. If the catch engages but jumps off, the step on the piston may be worn, or the catch contact face is worn, or the catch spring is too weak (early stock Retal).

Locking up at about half bolt travel may be a malfunctioning bolt lock. Running without locked breech isn't recommended for reliability reasons but you can try omitting all parts out of the rear bridge of the bolt carrier if you are having issues with them.

"Are banshees legal in HvZ?"
Quartermaster, Florida 501st
All AC drives all the time from here on. Brushes suck.
My nerf blog
Pages: [1]
Jump to:  

All opinions expressed on this web forum are those of the individual authors and not of Gnarwhal Studios INC.

"Humans vs. Zombies" and "HvZ" ® 2005-2012 Gnarwhal Studios INC.
HVZ SOURCE is a project created by Chris Weed (Dreamer of Dreams), Brad Sappington, Joe Sklover, Justin Quick,
Trevor Moorman, Max Temkin, and Ben Beecher.

Powered by SMF 1.1.21 | SMF © 2015, Simple Machines