AR Sponsor
Posted: 6/19/2007 6:28:36 PM EDT
| my ar has issues, it will extract the spent shell but not eject it before the fresh round comes up. both end up jammed in the chamber area. whats the problem. swapping the bolt helped a bit nut i want to know why it is doing that if its not a bolt problem |
|
Sounds like a lack of gas pressure / gas leak. Check to make sure your gas rings haven't lined up on the bolt, ring gaps should be at 10, 2, & 6 on the clock. Lube your bolt well before putting it back into the carrier too. You stated that you tried a different bolt but did you try a different carrier? #1 would be to check to see that the screws that hold the carrier gas key to the carrier body are tight and staked from the side. This is usually the problem. If the screws are tight then take a look at the gas tube were it meets the carrier key and where it meets the front sight base. Is there a bunch a carbon built up around either end? If the carbon is 360 degrees around the front of the tube by the gas block/front sight base then it's leaking gas. On the gas tube where it meets the carrier key doe it have a uniform bulge or flare? It should, this bulge can get worn down over time and cause a gas leak too. All depending on how many rounds you have through it you may want to get a new gas tube. I just went through this with my Bushmaster dissipator and had to put on a new Vltor gas block and gas tube on it, now it's 100% even with wolf ammo. |
|
Will the rifle pass a short stroke test (load a single round into the mag, charge and fire, with the end correct result being the bolt locked back on the catch). If the rifle does pass a short stoke test, then next, what ammo being used, and in what brand/make of rifle? From there, are you cleaning and lubing the rifle correctly, hence cleaning the chamber with a chamber brush, and lubing the upper bearing areas with CLP after you have removed all traces of copper solvent through the bore. Lastly, if everything above checks out ok and the rifle is full stoking (bolt locks back after last round), and you are not trying to break in a tight chamber with Wolf ammo, then suspect that the extractor spring is on the weak side and may need to be replaced. To confirm that the spring may be on the way out, install a #60 O ring around the extractor spring to see if the addition tension solves the problem. If it does, then a extractor spring replacement would the order of the day, and when ordering such, favorer either the Colt black insert M-4 unit, or a Wolf extra power spring than that a lowest priced vendors unit (could also be weak from the start). |
|
To check rings, without cam pin installed, put bolt in carrier then turn carrier so bolt faces down. Give it a LITTLE shake. If the bolt falls out, replace rings. If it stays in, rings are ok. Also lube everything as these Directions State. It could be a dry bolt. |
AR Sponsor