AR15.Com Archives
 Dead Hammer
opengun  [Member]
4/23/2011 7:33:27 PM
Just got my PAWS M16 receiver in last month and have only taken it to the range twice. I can't get a full mag dump. It will shoot between 5-10 rounds then the hammer will rest on the bolt and not fire. I have a noveske upper and H2 buffer installed. Any sugestions for what I need to do to get it running 100%. thanks.
Samuel_Hoggson  [Member]
4/23/2011 7:42:23 PM
Only happens on full auto, right? Hammer down with live round in chamber, right? Sounds like bolt bounce.

You probably don't want to hear this, but the rifle stock and buffer would probably end the issue. If you've got to have a collapsible try H3. If that fails I'm pretty certain an MGI buffer would do the trick.

Good video: http://www.youtube.com/watch?v=575Q0O41u5s&NR=1&feature=fvwp

Sam

BTW, welcome to the forum, and congrats on your 16.
opengun  [Member]
4/23/2011 7:56:58 PM
Correct, only happens on full auto with hammer down on live chamber. I have a H3 buffer but haven't tried it. Next time I get the the range I will try the H3 and a rifle stock and see if that fixes it. It's happening with all my uppers so I was wondering if its a timing issue. This was a new reciever that was never assembled.
Samuel_Hoggson  [Member]
4/23/2011 8:18:15 PM
I should be more precise - it's really carrier bounce. It's not the bolt that bounces, it's the carrier.

Anyway, intermittent nature of your failure to fire (5 to 10 rounds go off fine) sounds more like carrier bounce than a timing issue. I think a timing problem would manifest as a failure to run on FA at all.

If you've got the rifle stock/buffer lying around bring them to the range. If the H3 doesn't help try the rifle stock/buffer.

Sam
Shermantor-AR15  [Member]
4/23/2011 10:01:26 PM
Welcome to the board and congrats on the PAWS M16, I also have one.

BTW I did a FOIA request to find out more information on mine, and the serial number range P03xx was Form 2 a month before the ban in 86.



anyway back to the subject at hand, what kind of ammo are you using?
opengun  [Member]
4/23/2011 11:42:04 PM
tried selller & bellot 55gr I have had for 10yrs and lake city ss109 62 gr 2009 production. Same issue with both types of ammo.
GarrettJ  [Team Member]
4/25/2011 8:55:20 PM
Originally Posted By opengun:
I have a H3 buffer but haven't tried it. Next time I get the the range I will try the H3 and a rifle stock and see if that fixes it.

Just to point out, you do not want to use the combination of the H3 buffer and a rifle-length buffer tube. Try either the H3 buffer in the carbine stock (and tube) or a rifle-buffer in a rifle stock.

A carbine buffer in a rifle-length buffer tube is very, very not good.
opengun  [Member]
4/25/2011 10:33:22 PM
Originally Posted By GarrettJ:
Originally Posted By opengun:
I have a H3 buffer but haven't tried it. Next time I get the the range I will try the H3 and a rifle stock and see if that fixes it.

Just to point out, you do not want to use the combination of the H3 buffer and a rifle-length buffer tube. Try either the H3 buffer in the carbine stock (and tube) or a rifle-buffer in a rifle stock.

A carbine buffer in a rifle-length buffer tube is very, very not good.


That is what i mean't, try both combinations. Sorry about the confusion.
tony_k  [Moderator]
4/25/2011 10:35:21 PM
Originally Posted By GarrettJ:
Originally Posted By opengun:
I have a H3 buffer but haven't tried it. Next time I get the the range I will try the H3 and a rifle stock and see if that fixes it.

Just to point out, you do not want to use the combination of the H3 buffer and a rifle-length buffer tube. Try either the H3 buffer in the carbine stock (and tube) or a rifle-buffer in a rifle stock.

A carbine buffer in a rifle-length buffer tube is very, very not good.

A very big +1 to that. In fact, it's an efficient way to destroy your lower receiver.