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Posted: 1/25/2014 8:10:57 PM EDT
I was cleaning a few rifles this afternoon when I discovered something kind of interesting. The Colt bolt assembly lugs are a bit beefier than the Spike's lugs.
I'm not sure why it's this way but I just thought I would share. Both BCGs were purchased in 2013 and have only a few hundred rounds on them.

As a side note, I have zero issues with either bolt assemblies or bolt carrier groups and I trust both 100%.

http://i843.photobucket.com/albums/zz358/thearizonacowboy/image3_zpsdb015f23.jpeg

The Spike's is on the left.
Link Posted: 1/26/2014 1:45:12 AM EDT
Can you get a rear view pic of the lugs? How is the rear of the lugs breaking in? Is there wear on the lug sides of the colt? It could just be the camera flash but the Colt looks to have some rough machining on the sides of the lugs. The pic of the Colt bolt is better that is why I have the questions about it.
Link Posted: 1/26/2014 3:55:44 AM EDT
Possible optical illusion! Spikes took care of all the sharp corners.
Link Posted: 1/26/2014 8:00:51 AM EDT
LOL
Link Posted: 1/26/2014 8:08:55 AM EDT
Originally Posted By TheArizonaCowboy:
I was cleaning a few rifles this afternoon when I discovered something kind of interesting. The Colt bolt assembly lugs are a bit beefier than the Spike's lugs.
I'm not sure why it's this way but I just thought I would share. Both BCGs were purchased in 2013 and have only a few hundred rounds on them.

As a side note, I have zero issues with either bolt assemblies or bolt carrier groups and I trust both 100%.

http://i843.photobucket.com/albums/zz358/thearizonacowboy/image3_zpsdb015f23.jpeg

The Spike's is on the left.
View Quote


Beefier? Measure them accurately and report back.
Link Posted: 1/26/2014 8:10:23 AM EDT
Id like to see the lugs measured with calipers, and for God's sake take a pic in a well lit room sans flash.
Link Posted: 1/26/2014 8:29:44 AM EDT
Definitely  looks like the Colt lugs are "beefier"  to me.
Link Posted: 1/26/2014 8:40:56 AM EDT
Without being measured they look bigger because they didn't radius the edges as seen on the Spikes bolt.
Link Posted: 1/26/2014 9:40:48 AM EDT
I'll pick up some calipers tonight and take some measurements. Ill try and take some good photos.
Link Posted: 1/26/2014 9:42:47 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Cavitation:
Can you get a rear view pic of the lugs? How is the rear of the lugs breaking in? Is there wear on the lug sides of the colt? It could just be the camera flash but the Colt looks to have some rough machining on the sides of the lugs. The pic of the Colt bolt is better that is why I have the questions about it.
View Quote


I'll take some better photos tonight of the lugs for ya.
Link Posted: 1/26/2014 9:51:26 AM EDT
definitely thicker......
Link Posted: 1/26/2014 1:15:49 PM EDT
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Originally Posted By RUTGERS95:
definitely thicker......
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And rougher.
Link Posted: 1/26/2014 1:41:10 PM EDT
Unless the lugs are breaking off either, what does it matter?
Link Posted: 1/26/2014 1:46:16 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Cavitation:


And rougher.
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Cavitation:
Originally Posted By RUTGERS95:
definitely thicker......


And rougher.


But but but, its a Colt. It HAS to be superior!
Link Posted: 1/26/2014 1:46:43 PM EDT
I grabbed some easy to get to rifles for a quick comparrison of some of the bolt dimensions.  All the measurements listed are related to the lugs except one. I measured the thickness of the rim of the bolt face that encompasses the cartridge base. I'll just call it "Rim". Can't think of the proper terminology at the moment. I don't have any Colts anymore so someone else can provide that info maybe. Not sure if lug height was really worth listing as it varied a bit from lug to lug  being the radius at the base of each lug varies and the rim thickness affects that measurment as well. You can draw your own conclusions I guess. I've never had a problem with any of these.

Spikes#1 Width-.096   Height-.113 to .115   Length-.275   Rim-.068

Spikes#2 Width-.100   Height-.111 to .113   Length-.275   Rim-.072

Spikes#3 Width-.099   Height-.110 to .113   Length-.276   Rim-.072

Spikes#4 Width-.097   Height-.110 to .112   Length-.276   Rim-.070

BCM#1 Width-.097   Height-.109 to .113   Length-.276   Rim-.072

BCM#2 Width-.099   Height-.108 to .113   Length-.277   Rim-.072

BCM#3 Width-.098   Height-.109 to .113   Length-.275   Rim-.072

PSA#1 Width-.097   Height-.113 to .115   Length-.275   Rim-.071

PSA#2 Width-.097   Height-.110 to .113   Length-.275   Rim-.070
Link Posted: 1/26/2014 1:47:42 PM EDT
The Spike's have radiused edges you Colt humpers take a pair of calipers to the width what the hell is the scientific definition of "beefier" Spikes makes milspec bolts, meaning all the measurements that matter are to the same damn specifications as Colt's.
Link Posted: 1/26/2014 2:02:57 PM EDT
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Originally Posted By Medicfrost:
Unless the lugs are breaking off either, what does it matter?
View Quote


It doesn't matter. Just making an observation that I found interesting.
Link Posted: 1/26/2014 2:06:55 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By MagsonMagsonMags:
The Spike's have radiused edges you Colt humpers take a pair of calipers to the width what the hell is the scientific definition of "beefier" Spikes makes milspec bolts, meaning all the measurements that matter are to the same damn specifications as Colt's.
View Quote


As I said before, I am going to find the exact dimensions of my Colt and Spikes lugs later tonight. I do not own calipers so I have to pick some up.
Link Posted: 1/26/2014 2:38:12 PM EDT
[Last Edit: 1/26/2014 2:47:16 PM EDT by Triumphman]
Beveled edging will give the illusion of being smaller due to looking at the smaller face of the object, compared to looking at a non-beveled object.

As an old Machinist we called this Chamfer, when the sharp edges are taken off.

As long as all machined surfaces fall within the required measurements---whether it a few thousandths over or under---it's still a passing product, even if one looks "beefier."

 

Link Posted: 1/26/2014 3:10:35 PM EDT
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Originally Posted By blackbalt89:


But but but, its a Colt. It HAS to be superior!
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Originally Posted By blackbalt89:
Originally Posted By Cavitation:
Originally Posted By RUTGERS95:
definitely thicker......


And rougher.


But but but, its a Colt. It HAS to be superior!



I'm no colt fanboy.....
Link Posted: 1/26/2014 3:29:17 PM EDT
[Last Edit: 1/26/2014 3:38:59 PM EDT by wolverine05]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Medicfrost:
Unless the lugs are breaking off either, what does it matter?
View Quote


+1

It should be rather well established that both Colt and Spikes are quite capable of producing a proper bolt.
Link Posted: 1/26/2014 3:44:29 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By blackbalt89:


But but but, its a Colt. It HAS to be superior!
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By blackbalt89:
Originally Posted By Cavitation:
Originally Posted By RUTGERS95:
definitely thicker......


And rougher.


But but but, its a Colt. It HAS to be superior!


If you can make something better, you wouldn’t clone something less.

I have both, they both works; too lazy to dig ‘em out to check. besides, they already used the calipers to reversed engineer the colt, I trust them.
Link Posted: 1/26/2014 7:12:06 PM EDT
I guess some of you didn't understand that I only posted because I thought it was interesting. Not because I was trying to prove one over the other. As the original post says, I trust both 100%. I see Colt, Spikes, BCM, etc... all as the same. They all work great and personally, I could care less if they have some machining marks here and there, or a little size difference in the lugs.  All I care about is if the damn thing works. And they both do!

I apologize for the bad pictures in advance. I'm a broke college student and I'd MUCH rather have a few nice weapons than a good camera. I did try my best at the photos though.



http://i843.photobucket.com/albums/zz358/thearizonacowboy/B8D58E5F-B34D-4690-A5C2-D22ADBD2C2BF_zpsuvygzmpn.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/D3F75FC4-4CE8-4544-A452-48644F986E01_zpswqf5xrco.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/855235A9-F8AE-4D95-AB58-A76C67787F52_zpsvizkeldx.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/0DC255DF-908D-4DA6-8DEA-0EC775B92F79_zpswyv1b4cm.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/9851024D-F819-4035-858C-8C27677F6318_zpskqo76pxo.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/01445ADF-30AC-46E6-B663-5E55BD5316A9_zpscqsotydt.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/D14C921D-34DB-43C8-9B48-A793EAD048B3_zpsosqfmnel.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/4F971F99-DC55-417D-A446-F9DB9A6CFC12_zpso0hgzkdk.jpg

In these photos, you can clearly see that the lugs "appear" to be different sizes but the calipers say otherwise. I did check all the lugs and they're all the same width. Oh and a few pictures show some machining marks on the Colt lugs for anyone that cares.

I admit that my original assessment was wrong but that's how one learns!

Thanks for your help everyone. If anyone would like anymore pictures please let me know
Link Posted: 1/26/2014 7:31:24 PM EDT
Pretty cool OP.... Optical illusions will play tricks everytime.

Btw, thanks for taking the time to measure them and post additional pictures.
Link Posted: 1/26/2014 8:22:07 PM EDT
First it was Colt fanbois attacking anything that wasn't Colt, not it's the anti-colt brigade attaching Colt for anything they can find.  Can we maybe find a middle ground based on things like actual facts one day?
Link Posted: 1/26/2014 8:44:25 PM EDT
flip a coin.
Link Posted: 1/26/2014 10:46:07 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By TheArizonaCowboy:
I guess some of you didn't understand that I only posted because I thought it was interesting. Not because I was trying to prove one over the other. As the original post says, I trust both 100%. I see Colt, Spikes, BCM, etc... all as the same. They all work great and personally, I could care less if they have some machining marks here and there, or a little size difference in the lugs.  All I care about is if the damn thing works. And they both do!

I apologize for the bad pictures in advance. I'm a broke college student and I'd MUCH rather have a few nice weapons than a good camera. I did try my best at the photos though.



http://i843.photobucket.com/albums/zz358/thearizonacowboy/B8D58E5F-B34D-4690-A5C2-D22ADBD2C2BF_zpsuvygzmpn.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/D3F75FC4-4CE8-4544-A452-48644F986E01_zpswqf5xrco.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/855235A9-F8AE-4D95-AB58-A76C67787F52_zpsvizkeldx.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/0DC255DF-908D-4DA6-8DEA-0EC775B92F79_zpswyv1b4cm.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/9851024D-F819-4035-858C-8C27677F6318_zpskqo76pxo.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/01445ADF-30AC-46E6-B663-5E55BD5316A9_zpscqsotydt.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/D14C921D-34DB-43C8-9B48-A793EAD048B3_zpsosqfmnel.jpg

http://i843.photobucket.com/albums/zz358/thearizonacowboy/4F971F99-DC55-417D-A446-F9DB9A6CFC12_zpso0hgzkdk.jpg

In these photos, you can clearly see that the lugs "appear" to be different sizes but the calipers say otherwise. I did check all the lugs and they're all the same width. Oh and a few pictures show some machining marks on the Colt lugs for anyone that cares.

I admit that my original assessment was wrong but that's how one learns!

Thanks for your help everyone. If anyone would like anymore pictures please let me know
View Quote


Thanks for following up. I was surprised. Quite the illusion. I think we learned those dimensions can vary by a pube or two even within the same brand. No surprise there. For the record I understood what you were doing and found it interesting. Thanks again for the pics.
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