"P"Stamp on Sig Barrels.

[Ricochet]

Just wondering if anyone knows what the letter P in a circle means thats stamped on Sig barrels.

I have a Sig 229-R.

Thanks.

[Guns N'at]

Just wondering if anyone knows what the letter P in a circle means thats stamped on Sig barrels.

I have a Sig 229-R.

Thanks.

Pretty sure it is a proof mark for US produced pistols. German produced pistols will have an eagle holding an "N", meaning the proof was for "Nitro" (smokeless propellant), and will also have a stamp on the "nose" of the slide of which official proof house did the proof. All older German SIGs I have owned or examined had the city of Kiel proof mark stamped on them.

Here are what they look like: