AR15 won't cycle (Update)

[sabot92]

I just had someone watch while the gun reloads and the bolt is not pushing all the way forward. It stays about a half inch open.

[fishngamereaper]

Does the forward assist close it all the way. Sound's like its hanging on the locking lugs. But it may be hanging up on your trigger assembly since your not getting true reset.

[300rum]

What kind of magazine are you using?

[300rum]

One Mag?  Multiple mags doing the same thing? Cheap mags?

[JimmyHoffa]

How does it feel when it recoils?  Does it feel like the bolt carrier group goes smoothly back and not much recoil?  Or is it more like the bolt carrier group slams back and you get extra recoil?

[JLS]

Check the gas key screws and make sure they are tight.

Open up the upper from the lower, and check your trigger reset.  Press tigger, hold it in.  Cock hammer, then slowly let out trigger, and watch for the reset.  Is this happening okay?

Get a new magazine and see if you get lockback on an empty like jay.sharkbait recommended, then see if it will chamber a round.

[fishngamereaper]

Also make sure gas rings are staggared on your bolt.

[sabot92]

Also make sure gas rings are staggared on your bolt.

Can you explain that please? I know what the gas rings are but don't know what you mean by staggered. I'm only using a 30 round PMAG magazine at the moment. Recoil is very light. I have checked gas block and key and made sure they were tight. Cleaned everything multiple times.

[fishngamereaper]

Also make sure gas rings are staggared on your bolt.

Can you explain that please? I know what the gas rings are but don't know what you mean by staggered. I'm only using a 30 round PMAG magazine at the moment. Recoil is very light. I have checked gas block and key and made sure they were tight. Cleaned everything multiple times.

Slots in the rings shouldn't line up. Gas will blow by them and reduce ability of the BCG to function. Make sure the slots are all in different positions.

[sabot92]

Ok I just made sure of that. I think I will have to take it back and have them mess with it. The bolt keeps hanging up only when there is a round in the chamber. If I pull the charging handle back with the gun empty it functions just fine.

[JimmyHoffa]

Ok I just made sure of that. I think I will have to take it back and have them mess with it. The bolt keeps hanging up only when there is a round in the chamber. If I pull the charging handle back with the gun empty it functions just fine.

Empty meaning no magazine in the well or an empty mag inserted?

[JLS]

Also make sure gas rings are staggared on your bolt.

This makes no difference at all.  The slots are compressed whent he bolt is seated in the bolt carrier.

[JLS]

Ok I just made sure of that. I think I will have to take it back and have them mess with it. The bolt keeps hanging up only when there is a round in the chamber. If I pull the charging handle back with the gun empty it functions just fine.

okay, so if you rack the charging handle to chamber a round, does it seat?  If there is one in the chamber, and you rack the charging handle, does it eject a round and seat the other?

[sabot92]

Ok I just made sure of that. I think I will have to take it back and have them mess with it. The bolt keeps hanging up only when there is a round in the chamber. If I pull the charging handle back with the gun empty it functions just fine.

okay, so if you rack the charging handle to chamber a round, does it seat?  If there is one in the chamber, and you rack the charging handle, does it eject a round and seat the other?

It's not looking like the shell is seating properly. I will not eject a shell when I pull the charging handle back. The shell seems somewhat stuck in the chamber. I have to tip my gun and shake it out of the chamber.

[sabot92]

Ok I just made sure of that. I think I will have to take it back and have them mess with it. The bolt keeps hanging up only when there is a round in the chamber. If I pull the charging handle back with the gun empty it functions just fine.

Empty meaning no magazine in the well or an empty mag inserted?

Both.