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Posted: 12/23/2019 10:54:20 PM EDT
[#1]
It's a shit show. Mix master hodge podge without conformity.
Many Expanse were built with a mix of 6920 components. Many 6920s were sold labeled as Expanse. Most notably: Non milspec lo mass hammer. 1 PC mag catch button 6 position RE std CAR buffer Medium profile, non CLd bbl Thin, flexible gas tube Shitty single heat shield handguards No C stamped upper receiver No gold extractor spring CE S/N prefix |
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Posted: 12/30/2019 4:21:05 PM EDT
[#2]
Quote HistoryQuoted:
Medium profile, non CLd bbl Thin, flexible gas tube Shitty single heat shield handguards 
Measured and compared (one of them anyway) mine to known good gas tubes and noticed no meaningful difference at all. Found a thread here about it and noticed that the guy complaining gave no numbers / sizes at all for what he claimed was a 'thin' tube. No OD or ID given at all in that thread... Just complaining. Not buying that story personally without some specs / data to back up those claims. 
Did notice a 'G' marking on the barrels near the chamber that I had not noticed before. (Mark is almost directly under the gas tube and hard to spot) Pretty sure that means Green Mountain made it. That is a good thing in my opinion... Absolutely love those particular Expanse barrels.  I looked at the Green Mountain website last night and could not find that exact barrel listed for sale or any mention of it anywhere so I am 'guessing' that it is something they made for Colt to whatever specs Colt gave them? Those single shield, slim hand guards are 100% Colt parts. Colt 'Carbine' Hand Guards to be exact. Love the feel compared to the M4 fat oval type so... Bought a small pile of them to replace the OEM stuff on other Colts with. For me and for range use they just feel better in my hand. Have not tried to melt a set yet and have no idea how much it would cost in ammo to do it. |
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Posted: 12/30/2019 6:09:22 PM EDT
[#3]
Quote HistoryQuoted: You made me investigate the gas tube thing...
Measured and compared (one of them anyway) mine to known good gas tubes and noticed no meaningful difference at all. Found a thread here about it and noticed that the guy complaining gave no numbers / sizes at all for what he claimed was a 'thin' tube. No OD or ID given at all in that thread... Just complaining. Not buying that story personally without some specs / data to back up those claims.
Did notice a 'G' marking on the barrels near the chamber that I had not noticed before. (Mark is almost directly under the gas tube and hard to spot) Pretty sure that means Green Mountain made it. That is a good thing in my opinion... Absolutely love those particular Expanse barrels. I looked at the Green Mountain website last night and could not find that exact barrel listed for sale or any mention of it anywhere so I am 'guessing' that it is something they made for Colt to whatever specs Colt gave them? Those single shield, slim hand guards are 100% Colt parts. Colt 'Carbine' Hand Guards to be exact. Love the feel compared to the M4 fat oval type so... Bought a small pile of them to replace the OEM stuff on other Colts with. For me and for range use they just feel better in my hand. Have not tried to melt a set yet and have no idea how much it would cost in ammo to do it. As for the gas tubes/single heat shield guards....the guards that I bought from CDNN were flexible as hell and nowhere near as rigid as the USGI M4 style. The gas tube was obviously thinner walled and very easy to bend with one hand. (CDNN liquidated all remaining inventory from Bold Ideas LLC. Much of it legit Colt components, with a mix of trash.) |
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Posted: 1/3/2020 4:35:50 PM EDT
[#4]
I would like to know more about the gas tubes. I have Colt and non Colt tubes and can’t tell any difference but have always wondered. Shark Arms claims the Colts are thicker but sure would be nice to be able to actually test them in some way.
I’m sure C just buys them from some one anyway. |
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Posted: 1/3/2020 5:19:00 PM EDT
[#5]
Quote HistoryQuoted:
I would like to know more about the gas tubes. I have Colt and non Colt tubes and can’t tell any difference but have always wondered. Shark Arms claims the Colts are thicker but sure would be nice to be able to actually test them in some way. I’m sure C just buys them from some one anyway. The softer tubes may have the same wall thickness but an inferior material or process. Unsure. |
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Posted: 1/12/2020 11:37:57 PM EDT
[#6]
Certified Colt Armorer told me not to worry about changing my gas tube.
Did change to mag catch, pistol grip, buffer, spring, & stock to Colt. Put an existing Colt M4 upper on; Expanse M4A1 upper on another lower. |
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Posted: 1/12/2020 11:40:33 PM EDT
[#7]
Oh, yeah, also changed to selector to a Colt ambi; have a lefty in my home.
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