Full Auto Hammers > M-16

Posted: 1/16/2012 6:32:13 AM EDT

I have 2 post-sample lowers coming in soon and need a little help on the build. I was planning on one being a regular 5.56/300 BLK, which is pretty straight forward.

For the second one, I was thinking about going 9mm. Is there a difference between the semi-auto 9mm hammer and a full -auto? Do I even need a different hammer? The rest of of the conversion looks pretty simple, but this part has me stumped.

Posted: 1/16/2012 2:27:18 PM EDT

[#1]

No difference in the FA versions.

Posted: 1/16/2012 3:29:19 PM EDT

[#2]

Quoted:
No difference in the FA versions.

Circuits,

Should the FA 9mm bolt still be "ramped" to reduce stress on lower? Thanks.

D

Posted: 1/16/2012 3:37:52 PM EDT

[#3]

Quoted:
Should the FA 9mm bolt still be "ramped" to reduce stress on lower? Thanks.

Most folks recommend it, but I've never bothered doing it to mine.

If I were building up a new unit, I'd probably buy one with a ramped bolt.

Posted: 1/16/2012 6:02:36 PM EDT

[#4]

while I never use my 9mm bolt in a auto, yet (the wait).

I have broken a hammer pin with an unramped bolt in a pistol. I sent my bolt out of get ramped after that. I do not want to hurt my RR just becasue I was a lazy ass.

$50 shipped and back to my door in the same week is not bad.

Posted: 1/17/2012 1:31:01 PM EDT

[#5]

FWIW, I also broke a hammer pin in my 9mm AR pistol after < 500 rounds with an unramped bolt. I would definitely get it ramped before any full-auto use.

Posted: 1/17/2012 4:01:50 PM EDT

[#6]

I have busted many pins on 9mm (ramped bolt) and other blow back guns after lots of rounds. I would just use KNS pins and not worry about it.

Posted: 1/18/2012 2:47:18 PM EDT

[#7]

Just ordered a set of KNS pins to take care of any potential problems. I'll make sure I use a ramped bolt (or get one ramped) when I do the build.

Thanks for the help guys!

Posted: 1/18/2012 3:03:55 PM EDT

[#8]

Quoted:

while I never use my 9mm bolt in a auto, yet (the wait).

I have broken a hammer pin with an unramped bolt in a pistol. I sent my bolt out of get ramped after that. I do not want to hurt my RR just becasue I was a lazy ass.

$50 shipped and back to my door in the same week is not bad.

You're welcome.

Posted: 1/18/2012 4:22:02 PM EDT

[#9]

Where is a good source for ramping a bolt?

Posted: 1/18/2012 5:27:28 PM EDT

[#10]

Both M60Joe and ADCO firearms offer this service.

Posted Via AR15.Com Mobile

Posted: 1/19/2012 5:32:50 AM EDT

[#11]

Quoted:

Quoted:

while I never use my 9mm bolt in a auto, yet (the wait).

I have broken a hammer pin with an unramped bolt in a pistol. I sent my bolt out of get ramped after that. I do not want to hurt my RR just becasue I was a lazy ass.

$50 shipped and back to my door in the same week is not bad.

You're welcome.

Thanks O21

I use MGP, you can IM him here on ARFcom.

Very nice guy, very nice work, very fair price, & very very FAST.

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