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9/22/2017 12:11:25 AM
Posted: 3/15/2006 4:12:21 PM EDT
Is it necessary to have a 9mm hammer? If yes, then why? If not, then is there any benefit anyway?

Anyone using a McCormick or other Enhanced trigger in their 9mm?

Link Posted: 3/15/2006 4:42:28 PM EDT
Link Posted: 3/16/2006 3:17:53 AM EDT
[Last Edit: 3/16/2006 1:37:15 PM EDT by thebomber]

Originally Posted By SBR7_11:

Interesting read but it was geared towards hammer/FA sear engagement issues. My question, IS anyone running a drop in trigger from McCormick or JP in their 9mm?

Link Posted: 3/16/2006 12:10:52 PM EDT
You need a hammer w/ a rounded tip i.e. standard M16, dpms, colt or rra (9mm), or you need a ramped bolt. if you use a notched hammer you will lock the upper, lower and bolt together when the hammer catches the slot on the bolt and wedges itself in there. I'm not fimilar w/ the profile of the McCormick or JP hammer to say if it will work, though either should work w/ a ramped bolt.
Link Posted: 3/16/2006 1:36:51 PM EDT
[Last Edit: 3/16/2006 1:38:37 PM EDT by thebomber]
I figured it needed to be rounded that why I was wondering if anyone had tried a McCormick or JP as they are rounded.

Here is the JP:

And here is a RRA 9mm hammer:

I'm new to the 9mm ARs and the JP I have that isn't in use was expensive so I wanted to have at least a decent chance of not ruining it.

Link Posted: 3/16/2006 4:24:31 PM EDT
It looks like the JP hammer should be fine. There's nothing to catch and lock everything together like with a notched hammer.
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