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Throbbing Member. Viagra only made me taller.
NM, USA
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Posted: 11/22/2023 12:01:16 PM EDT
All my gun owning life, my Colt AR's have all had the notch cut in the hammer ostensibly to prevent the gun going full auto if the disconnector fails because the firing pin will "catch" in the hammer notch and bring everything to a stop.
Attached File Recently I purchased a CMMG 22lr conversion kit. The kit's instructions say it works better in an AR with a rounded, or un-notched hammer. Crap. Since I don't have that many AR's anymore and all three are Colts, I thought I might as well check them even though I already know they're notched. Surprise, surprise. The CR6920 I bought in 2020 right after Colt rescinded their "pause" in civilian AR manufacture actually has a rounded hammer with NO notch. This is literally the only one I've seen like this. Every other Colt I've ever owned has had the notch ground in the hammer. Anybody else get a rounded, or un-notched hammer? Attached File |
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"If men define situations as real, they are real in their consequences."--W.I. Thomas _____________________ "If you ever really need a gun, you'll need it more than anything else you've ever needed in your life." |
They were common in the Colt expanse series around that time frame
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There was a recall on hammers in some Colt ARs within a certain serial number range not all that long ago. Maybe someone can post a link so you can check yours.
But anyways, I'm not sure if current Colt ARs are coming with the notched hammers or not. All I know is that they became completely unnecessary as soon as Colt started shipping their rifles with M16 carriers with (large flange) M16 firing pins. They should have switched to non notched hammers when they made that change. |
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Throbbing Member. Viagra only made me taller.
NM, USA
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Originally Posted By 556Cliff: There was a recall on hammers in some Colt ARs within a certain serial number range not all that long ago. Maybe someone can post a link so you can check yours. View Quote I remember that. Mine missed the quoted range. Recall |
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"If men define situations as real, they are real in their consequences."--W.I. Thomas _____________________ "If you ever really need a gun, you'll need it more than anything else you've ever needed in your life." |
Originally Posted By DocApocalypse: All my gun owning life, my Colt AR's have all had the notch cut in the hammer ostensibly to prevent the gun going full auto if the disconnector fails because the firing pin will "catch" in the hammer notch and bring everything to a stop. View Quote Not at all possible in any Colt stuff put out in the last what 20 years or so? (I forget when exactly they stopped molesting the carriers with the heavy milling at the ass end around the firing pin shoulder) If you have a regular and unmolested carrier that FP collar is never, ever going to be exposed to any notch in any hammer. Shrouded vs unshrouded carriers if you you want to do more learning on this... That Colt hammer notching is a relic from the past that serves no purpose whatsoever today in anything they produce. |
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Originally Posted By DocApocalypse: Anybody else get a rounded, or un-notched hammer? https://www.ar15.com/media/mediaFiles/271112/no_notch_jpg-3036082.JPG View Quote Yes. :) Personal preference is for the Schmid NiB hammers. Bough a small pile of those kits when they were on super sale just for those specific hammers... :) (not saying that the Schmid NiB triggers are bad - I use them in a few lowers but not my preferred trigger by far) I generally expect a 1/4 to 1/2lb reduction in pull weight with the coating on the hammer being the only thing changed. (swapping only a Schmid NiB hammer for a phosphate / notched Schmid Colt hammer and keeping all other parts / springs the same) Various real deal FN trigger parts recently went on super sale somewhere and I laid in on a small pile of them. (They would not have got the contracts they did if they were pumping out garbage right?) Schmid parts all the way. From FN... :) Would like to see some pictures of the markings on your CR Colt parts (the rounded hammer CR stuff you said you had) to try and learn where exactly they came from / who made them. |
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Fwiw, my 2012 Colt isn't notched.
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'20-'21 non notched hammers started showing up.
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Can't never could 'til try came along.
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CR series 6920 - round hammer, FA carrier
Euro Spec 6920 - notched hammer, FA carrier |
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Disclaimer - OP is bad at knowing things, and might catch on fire.
... Every other species kills off their stupid......we cater to them. -- spin-drift Nobody ever called 911&said I just did something smart. -- TheFlynDutchman |
I had a 6951 come with a full auto hammer.
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I've seen both over the past two years or so of production.
-OEM-1 purchased October 2022, manufactured April 2022: notched. -6940 purchased Feb 2023, manufactured December 2022: rounded/not notched. -6960 purchased June 2023, manufactured October 2021: notched. |
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I've seen a number of Colts with rounded M16 style hammers over at least the last 4 years. The ones I've seen have all been Schmidt made parts. It was a good move by Colt IMO and all Colts should come with them IMO.
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On going to war over religion: "You're basically killing each other to see who's got the better imaginary friend." - Richard Jeni
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Originally Posted By Aaron56: Not that I have ever seen in any of the many videos of guys breaking down and comparing their CE 1000 stuff and comparing various bits to their LE series stuff (Lots of those videos on youtube btw) and not in any of the CE 2000 series of Expanse carbines that I personally own. This is what came in both my Expanse carbines - https://i.imgur.com/X9rlcsO.jpg Notice how they not only did the regular Colt notch in the hammers but also mutilated the ass end of the trigger... WTF Colt! Aside of all the usual Colt notching and hacking away at various bits of metal here and there (that I despise) I have to say that both of my samples or trigger parts from the Expanse line stuff were / are freaking awesome parts as far as their pull weight and 'feel' compared to any of the other Colt factory stuff I have ever run across personally. Yes, I understand that Colt factory parts are going to fall in a particular 'range' as far as pull weights and such are concerned (and that is most likely going to be at the heavy end of the range with Colt) but... Even if the only parts I am swapping are the trigger and hammer (keeping previous springs/pins and such) I lost measurable weight every time with the Expanse parts being swapped for factory 6721, 6920, etc. each and every time I played around with swapping them in and out of various Colt receivers. Regardless of all the Colt hackery they are all still Schmid Tool parts and perfectly acceptable for use in my opinion. Like I said, mine measured noticeably lighter than other Schmid / Colt parts from everything I compared them to for myself. Still using my Expanse trigger parts and no plans to ditch them any time soon. View Quote That butchered trigger is a leftover from the (steel insert) sear block days. |
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Originally Posted By SSeric02: I got this one on a NIB 2021 vintage 6933 I recently took possession of. It looks like a notched hammer that was ground down. ETA: Serial number on that CR6933 is a couple thousand below the bottom end of the recall range. https://i.imgur.com/nl5IKgm.jpg View Quote Well that's a weird one. Haven't seen that before. |
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On going to war over religion: "You're basically killing each other to see who's got the better imaginary friend." - Richard Jeni
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Originally Posted By airgunner: Well that's a weird one. Haven't seen that before. View Quote View All Quotes View All Quotes Originally Posted By airgunner: Originally Posted By SSeric02: I got this one on a NIB 2021 vintage 6933 I recently took possession of. It looks like a notched hammer that was ground down. ETA: Serial number on that CR6933 is a couple thousand below the bottom end of the recall range. https://i.imgur.com/nl5IKgm.jpg Well that's a weird one. Haven't seen that before. +1 |
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Can't never could 'til try came along.
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Me either.
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There were several variations in the hardened steel sear blocks Colt used that varied by how they were pinned into the lower receiver. The image on the right shows one with the additional vertical roll pin on the right rear corner; that sear block has also been milled down for use with a M16 profile bolt carrier.
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Originally Posted By Aaron56: When I first read your post I was going to reply and tell you that you were full of crap and that I actually OWNED a Colt 'sear block days' lower and that 'No', that sear block did not in any way require the ass end of the trigger to be molested and hacked away at for those parts to function correctly together. Was going to take the time to 'really show you' and bust out a few pictures of a few of my different 'sear block days' triggers and show you how they did not require molesting back there like they did on the Expanse triggers... https://i.imgur.com/czbnDQL.jpg Thankfully for me, I did some more reading and learning before replying and making myself look more stupider than I already am. You 100% nailed it as to where those came from and why they were contracted to be done like that. Before today I had no freaking clue that Colt had more than one version of their sear block garbage. https://i.imgur.com/ru2sz4m.jpg ' The one on the left does not interfere with the ass end of the trigger in any way (the Colt fuckery version of the sear block 'goodness' that I have) but... That sear block on the right most definitely does. Appreciate you helping me to learn more and sorry that I initially thought you were an idiot. Pretty sure I am the dummy here for not knowing the differences. :( View Quote LMAO! No worries! I learned (more detailed information) about the blocks from a you tube guy named Pete egger in north Las Vegas. Evidently the geissele large pin triggers are so cut and velocity drop in large pin units will not fit his personal block lower. You, sir have given me even more information. Thank you. My personal AR6721 is c2002 and has the cut trigger and web receiver as well as the notched hammer & 1/2 moon BCG. My AR6720, form 2013, has the notched hammer and plain trigger. |
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Yes one on one of my Colt 14.5" M4A1 SOCOM LE6920SOCOM's has one, all my other ones have the notched hammer.
Hammer |
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I replaced the stock hammer on my AR15A4 with a A1 freedom hammer like my 9mm AR6961 came with.
A friend of mine just bought a SIG M400 TREAD AR and it had a A1 hammer. |
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