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This Inland looks pretty good from far away and the seller does offer an inspection period: http://www.gunbroker.com/Auction/ViewItem.aspx?Item=459323460

The carbine has been offered for a while...

Merry Christmas, Smokeeaterpilot
There were 2 types of M1A1 stocks produced so your friend will need to determine which type he has before we can tell which serial number range it is appropriate...

I have heard the same thing, a V notch rear and/or shortened ears on the front sight to enhance low-light target acquisition by a GI in the field. However, it does make sense that it might not pass...

Nice Underwood, cplnorton. It could well be a former USMC weapon, have you ever looked for a Springfield Research Service hit on it? Thanks for sharing!

I'm not sure if a 1911A1 front sight is what you're looking for but Bill Ricca has some for sale.
HTH