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usgi barrel? |
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bumppo 
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Joined: Jul 12 2020 Location: canada Status: Offline Points: 37 |
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 Topic: usgi barrel?Posted: Aug 09 2020 at 12:01pm |
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can anyone offer an opinion as to this barrel's authenticity, based on these photos?
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bumppo
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Posted: Aug 09 2020 at 12:06pm |
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the rifling seems new, but a 30-06 cartridge inserted bullet-first drops down freely to within a 1/16" or less of the case rim.
I purchased the gun last month, advertised as "all original configuration".
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jackp1028
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Posted: Aug 09 2020 at 12:26pm |
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Sometimes it's hard to judge muzzle erosion with a 30-06 cartridge. It looks to me like an almost "new" original Underwood barrel. Tell us about the rest of the carbine.
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JackP
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blackfish
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Posted: Aug 09 2020 at 12:38pm |
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The turning marks appear rather fine for Underwood and the top of the "bomb" just beneath the flame looks different than the picture here on this site
 On this basis, admittedly a small sample (ignoring the date), I would vote no |
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floydthecat
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Posted: Aug 09 2020 at 1:19pm |
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I’m not the expert here, but if it’s fake...it is a very good one. Maybe the variation in turning was due to a tool-change or machine variation, or even the camera angle?
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bumppo
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Posted: Aug 09 2020 at 1:38pm |
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some parts show little wear:
    other parts show heavy wear:   the stock has a nice finish but it fits poorly around the receiver at the recoil plate and around the trigger housing. and it has a sharp hump above the handgrip.    the rear sight has little or no staking at the right front corner in the receiver dovetail.   it was advertised as an "all original configuration" standard products usgi m1 carbine, serial #2018758. I purchased it online, a novice, in June of this year, at a premium price, from a gun shop in ontario, canada. I was unable to examine it in person beforehand due to the pandemic border restrictions.
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jackp1028
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Posted: Aug 09 2020 at 2:26pm |
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I've seen both finer turnings and coarser turnings on original Underwood barrels. Also, the stock fit looks typical.
It looks like a righteous Standard Products carbine, so far. What are the numbers stamped on the bottom of the operating slide, at the front of the trigger housing and on left side of the receiver? They might tell us something. |
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JackP
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bumppo
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Posted: Aug 09 2020 at 2:47pm |
 
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bumppo
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Posted: Aug 09 2020 at 3:02pm |
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I haven't fired the gun yet. I'm, nervous, because the gas piston is stuck 'in'. I tried closing off the breech end while blowing air down the barrel from the muzzle, and it didn't budge. I've ordered a piston nut wrench from sarco inc in Pennsylvania, but it might take weeks to reach me in atlantic canada. someone on YouTube suggested filling the whole barrel and gas cylinder with solvent and letting it soak like that overnight?
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jackp1028
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Posted: Aug 09 2020 at 3:17pm |
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The manufacturing codes on the bolt and trigger housing are consistent with what has been seen on other carbines showcased in CCNL "Carbine of the Month" data sheets. The slide is off a bit, but there's not much history on serial numbers in this range so I wouldn't say it's incorrect. The barrel date corresponds to the serial number so it's probably original too. Again, so far it looks original.
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JackP
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jackp1028
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Posted: Aug 09 2020 at 3:21pm |
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I bet that gas piston loosens up after one or two rounds. Removing the piston should be a last resort, like if it doesn't cycle at all when fired.
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JackP
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floydthecat
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Posted: Aug 09 2020 at 4:00pm |
Plus 1. Shoot it....the worst thing that can happen is it might stay stuck. Don’t monkey with a piston nut until you have to. There are other things to try and free it up, if it comes to that.
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W5USMC
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Posted: Aug 09 2020 at 6:09pm |
Plus 2,
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Wayne
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Why Carbines?
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Posted: Aug 09 2020 at 7:03pm |
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I'm wondering if the rear sight hasn't been off at one time or moved going by the edge of the dovetail on the right. I see the one stake mark at the rear lines up fairly well though, but there's ways to make that happen--just an observation. I also wonder about the flame lick on the cartouche, it's probably good though.
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bumppo
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Posted: Aug 09 2020 at 7:48pm |
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more views of the rear sight: 
  there are bluing scrapes close to the muzzle on the top of the barrel, but not around the sides or bottom:  |
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jackp1028
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Posted: Aug 09 2020 at 7:55pm |
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Parts are correct but that may have been the plan. Yeah, the rear sight's been off and on a couple of times. Why? Who knows. What does the barrel band look like?
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JackP
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GotSnlB28
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Posted: Aug 09 2020 at 8:03pm |
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I'm suspicious the rear sight is not USGI... but I defer to experts such as Dr. Flipsight.
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bumppo
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Posted: Aug 09 2020 at 8:21pm |
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the barrel band has no marks on it.
there is a punch mark on the top of the barrel about 5 inches behind the muzzle, but no letter P anywhere on this rifle (that I've found yet) except for a trace of a P inside a circle on the bottom of the hand grip.  here's a closer view of the flaming bomb: |
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bumppo
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Posted: Aug 09 2020 at 8:24pm |
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barrel band front view (upside down, sorry):
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jackp1028
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Posted: Aug 09 2020 at 8:28pm |
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Let's see the top. Looking at the spot welds. 2 or 3?
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JackP
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jackp1028 wrote: