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4/30/2026 7:54:17 PM EDT
I want to apply for a stamp for this lower, but not sure what characters to use for the serial number.  There are two additional digits in the greyed out area.

SAR 4 40XX is what the engraving shows.

And I assume the model number should have a space between SL and 15?  'SL 15' ?
And I can select 5.56 for caliber since it is a multi?

4/30/2026 8:27:57 PM EDT
[#1]
Serial Number = "SAR440xx"

Model = "SL15"

Caliber will be the actual caliber it will be once built.  Do not put multi.

4/30/2026 8:33:27 PM EDT
[#2]
Quote History
Originally Posted By D_Man:
Serial Number = "SAR440xx"

Model = "SL15"

Caliber will be the actual caliber it will be once built.  Do not put multi.

View Quote

This.
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4/30/2026 8:55:11 PM EDT
[#3]
First answer is the correct answer.
USMC 85-'93 Amphibious YAT-YAS

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