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Posted: 3/27/2009 9:18:22 AM EST
Recently purchased several RRA LPKs for a local group buy/build I was coordinating.

The LPKs ended up having two different hammer styles. Style 1 was unnotched and marked with four dots in a circle on the left side of the hammer. Style 2 was notched and marked with two letter S on the right side of the hammer. Style 1 has noticeably better trigger pull.

Are these both genuine RRA hammers? Could there have been a mixup? What style hammers do known-genuine RRA rifles use?


Link Posted: 3/27/2009 9:57:24 AM EST
I've only had three RRA LPK's so that is not adequate enough sample size to draw any conclusions but all three of mine were style 2.
Link Posted: 3/27/2009 10:03:49 AM EST
I can't view the photos at work due to the filters. All of the RRA parts kits I have used have had notched hammers.

Link Posted: 3/27/2009 10:12:03 AM EST
My RRA hammer is notched. The top image looks like an un-notched DPMS type hammer.
Link Posted: 3/27/2009 10:13:42 AM EST
the one that came in my LPK was style 2
Link Posted: 3/27/2009 10:14:37 AM EST
[Last Edit: 3/27/2009 10:16:32 AM EST by ahelplessnun]
The RRA's kits I own look like your second photo. Same markings too. They are definately notched as mentioned above. My complete weapon came with the 2-stage, so I cant say for certain concerning complete weapons though.
Link Posted: 3/27/2009 10:15:39 AM EST
[Last Edit: 3/27/2009 10:16:43 AM EST by Agro]
Never owned a RRA single stage, but that notch looks RRA'ish :)
Compare to their 2-stage NM hammer, same notch
Link Posted: 3/27/2009 10:18:50 AM EST
Interesting. I really like the Style 1 hammer - I wonder who made it if it wasn't RRA?
Link Posted: 3/27/2009 11:30:58 AM EST
Somebody edjumicate me, what is the reason for the notch?

Thanks,

Hootbro
Link Posted: 3/27/2009 11:35:12 AM EST
+1 on the second style with the notched hammer. However my RRA LPK has a noticably better pull and break then my dpms LPK and others i have used.

mike
Link Posted: 3/27/2009 11:36:50 AM EST
Interesting, I just got a stag LPK direct from stag and the hammer in that one is exactly like the one in pic one right down to the
4 dots in the circle.
Link Posted: 3/27/2009 11:46:52 AM EST
Originally Posted By 58zouave:
Interesting, I just got a stag LPK direct from stag and the hammer in that one is exactly like the one in pic one right down to the
4 dots in the circle.


Thanks - it is entirely plausible that some RRA parts got crossed over with some Stag parts.
Link Posted: 3/27/2009 11:46:52 AM EST
They're both RRA supposedly! I've been informed RRA has 2 different suppliers for their LPKs, hence the differences. I've found the LPK w/ the hammer in photo #1 gives a better trigger pull as well. #2 is much more heavy!!
Link Posted: 3/27/2009 12:21:48 PM EST
Originally Posted By 58zouave:
Interesting, I just got a stag LPK direct from stag and the hammer in that one is exactly like the one in pic one right down to the
4 dots in the circle.


Stag has switched to the no-notch hammer in the last year or two.
My first four Stags had notched hammers.
My last two have been no-notch.
Link Posted: 3/27/2009 12:41:40 PM EST
just bought a RRA LPK and it has notched hammer with the "s"
Link Posted: 3/27/2009 1:04:29 PM EST
[Last Edit: 3/27/2009 1:05:05 PM EST by P229SAS]
Holy hell I can't believe I missed this thread.

I ordered two Stag LPKs directly from their web site and was shipped two kits from what I guess is their distributor LAN World.

One hammer looked like the top picture with the circle and 4 dots then the other hammer looked like the bottom picture with two "S" stampings etc.

There are also other variations in the features of the hammers as seen in my photos.

Also, one of the disconnectors looks off although it is probably functional.

Check out my thread:

http://www.ar15.com/forums/topic.html?b=3&f=118&t=434832

ETA: I also have a RRA hammer purchased about a year ago that has the two "S" stampings.
Link Posted: 3/27/2009 1:34:34 PM EST
My last LPK was from DPMS as I did not want the 'notch'. There was no makers marks on the hammer.
Link Posted: 3/27/2009 1:41:47 PM EST
My single stage RRA lower that I bought about a month ago looks like #2.
Link Posted: 3/27/2009 1:54:55 PM EST
I have style 1 but without the four dots in the circle
Link Posted: 3/27/2009 2:01:57 PM EST
different suppliers, that's all
Link Posted: 3/27/2009 2:14:28 PM EST
Just looked at my new 6940 (.154" pins) and my hammer has the two "S"s but not the circles. Whoever "S" "S" is, Colt is using their hammers in their .154" FCG lowers.

Larry
Link Posted: 3/27/2009 2:58:48 PM EST
The hammer without the notch looks like the one in My Stag Model 2. Including the 4 dots.

The notched hammer question has come up before:
http://www.ar15.com/forums/topic.html?b=3&f=118&t=400702
Link Posted: 3/27/2009 8:00:25 PM EST
[Last Edit: 3/27/2009 8:04:38 PM EST by Monoz]
Originally Posted By rjdixon7:
The hammer without the notch looks like the one in My Stag Model 2. Including the 4 dots.

The notched hammer question has come up before:
http://www.ar15.com/forums/topic.html?b=3&f=118&t=400702


LOL - I was OP on both threads.

The other thread I was asking questions because I was thinking a little about (and still am) an alternative hammer/trigger design.

This thread, I was just curious if my parts were genuine RRA. Also, the one without the notch has a noticeably better pull, but that clearly has nothing to do with the notch and is probably just better sear surfaces.
Link Posted: 3/27/2009 9:55:38 PM EST
That looks just like the hammer I got with my M&A kit
Link Posted: 3/27/2009 10:00:10 PM EST
[Last Edit: 3/27/2009 10:01:04 PM EST by P220C]
My RRA hammer from a LPK I bought last summer looks like No. 2

The reason for the notch, from what I understand, is that if you get a following hammer it will catch on the bolt carrier and not strike the primer.

ETA: A following hammer would be a malfunctioning hammer from broken parts, and pretty unlikely event. The notch is not required IIRC
Link Posted: 3/28/2009 1:44:00 AM EST
Interesting thread.
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