I actually have a Mk25 and the barrel IS chrome lined. They do it for corrosion resistance. The front grip serrations are not listed in the specs, so does that mean it doesn't have front grip serrations? It's a great gun, buy one someday and you'll see.

I actually own a Mk25 and I'm looking at it right now. It has a chrome lined barrel and so did the M11-A1 I actually had too. They do it for the extreme corrosion resistance of chrome. For some reason SIG doesn't not list it as a spec.

SIG sauer's web site says phospahted internal controls....no mention of chrome lining the barrel....wouldn;t really be necessary SIG SAUER® stainless steel pistol barrels are precision hammer forged to insure accuracy and barrel life. Each is specially heat-treated for toughness and durability. No need to chrome line a stainless barrel.

It's a SIG, duh it's good. The barrel IS chrome lined. So is the M11-A1's barrel, had the M11 before the MK25.

Yes the barrel is chrome lined

Re: S Nunez's comment: yes, a superior handgun. I don' t think the barrel's chrome lined.

I ordered this gun from top gun supply and when I first had it in my hands, you can see and feel the different finish of anti corrosive materials the gun is finished in. That's not all, a thicker m1913 rail,a chrome lined barrel,nite sights, plus 3 military mags. Im not a seal but I know I got a gun that ready for any outdoor environment. Any sig is a quality gun but this is a step above......great collectible piece for any collector or veteran!