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AR15.COM
7/12/2025 2:09:31 PM EDT
Found one of these at the gunshow for an awesome price, didn’t have my calipers on me, obviously, so couldn’t measure the FCG pins.

Does anyone know if these have standard or large FCG pins?

The lower is marked sporter, target model.  It has no bayo lug, and has the large 2 piece pivot screw.  Debating on going back to the gunshow for it.
7/12/2025 2:56:12 PM EDT
[#1]
Should be the large.
7/12/2025 3:40:40 PM EDT
[#2]
My Sporter Match HBAR has standard sized hammer/ trigger pins.  Both of these are the preban with the flash suppressor but minus the bayonet lug.

If it has the oversized screw headed pivot pin then it most likely has the standard fire control pins.

The Match Target line was the post ban and more likely to have the larger pins.  

But we are talking about Colt so it could have just about any combo of parts.
Drugs kicked in now, need sleep, radiation tastes funny at 7 am every day... a bit like victory. - Ginger
7/12/2025 6:04:35 PM EDT
[#3]
Quote History
Originally Posted By Bumblebee_Bob:
My Sporter Match HBAR has standard sized hammer/ trigger pins.  Both of these are the preban with the flash suppressor but minus the bayonet lug.

If it has the oversized screw headed pivot pin then it most likely has the standard fire control pins.

The Match Target line was the post ban and more likely to have the larger pins.  

But we are talking about Colt so it could have just about any combo of parts.
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This one is preban with the flash hider, it's one of those transitional models that had flash hider, but neutered bayo lug, I assumed they were still using small fcg pins, but I guess my only option is to mic it if I go back.
7/12/2025 6:50:34 PM EDT
[#4]
I had a 6551 made right before the ban.  It had the .250 pivot pins (although the front one had a two piece pin and was not drilled for the captured pin) and it had the large FCG pins.
Flash hider, shaved bayo lug, and pinned in sear block.
7/13/2025 5:42:25 PM EDT
[#5]
Quote History
Originally Posted By ChemTrailZ:
, but I guess my only option is to mic it if I go back.
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Is this a make or break detail for you?  If the price was good I wouldn’t care, especially not enough to carry calipers with me back to the show.

I could see wanting standard items on an everyday/HD rifle but Inwould think anyone looking to buy this in todays times already has something that would fill that role.
7/14/2025 10:49:04 PM EDT
[#6]
Quote History
Originally Posted By oxford411:


Is this a make or break detail for you?  If the price was good I wouldn’t care, especially not enough to carry calipers with me back to the show.

I could see wanting standard items on an everyday/HD rifle but Inwould think anyone looking to buy this in todays times already has something that would fill that role.
View Quote


Yes
8/17/2025 12:25:24 PM EDT
[#7]
Quote History
Originally Posted By ChemTrailZ:



This one is preban with the flash hider, it's one of those transitional models that had flash hider, but neutered bayo lug, I assumed they were still using small fcg pins, but I guess my only option is to mic it if I go back.
View Quote


Carry a standard firing pin your pocket and compare that to the other pins.

8/18/2025 11:30:55 PM EDT
[#8]
Quote History
Originally Posted By Aaron56:


Carry a standard firing pin your pocket and compare that to the other pins.

View Quote



Not sure what a firing pin has to do with fcg pins?

In any event, appears there are too many variations in sporter models, so I've been looking at match target hbars.  I am not sure of the various other MT models, but have confirmed both with colt archives, and a physical rifle, that t least as early as CMH47xxx, these have standard fcg pins on MT6601 models.  Still looking for a decently priced one for myself, but figured I'd throw it out there for anyone else looking.

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