Vinegar WILL remove the bluing also. Dave

@PewPewPop  You have to look very carefully under the white textAnd let me know if you found it 

@William Brooks  You make me a little jealous, that's a nice set of Sigs.I'm still waiting to buy a Sig 17 6mm (the one in the picture is not mine, it was just for illustration).But there are...

Go ahead, ask me. Do I like Sig AGs? Yes, thanks for asking. My CCW firearm of choice is the P365. I also like my Colt Cobra and S&W Body Guard. But I digress...These are the Sig handgun AGs ...

Ordered and received my first GBB - the Sig M17 which handles gas and CO2. Put it through its paces using gas and got an avg FPS 350. Fairly accurate, but one of the two gas mags seemed to send ou...

On my metal version, the SKU and S/N is on the underside of the handguard.

Maybe they don't check the electric gun forum so i'll try my luck here... https://barraairguns.com/community/forum/topic/175771/trying-to-register-my-400e-but-can-t-find-the-serial-number Basical...

Ok... i see that in one of Barra's youtube videos, something looked like a serial number is on the bottom of the handguard.   I have a 400e Polymer version.  Perhaps there isn't one on it?

I understand that it should be on the handguard?   I don't see it.

I've also emailed support but haven't heard back...

Although both the metal and polymer ones have the same internal mechanisms, the box FPS rating on them are different with the poly being 430fps and metal being 440fps.   10fps is in the stand...

Looked on the gun, box and receipt and nothing.  Do I need to disassemble it to get it?  Or is there not one?

@William Brooks  Taran Tactical Innovations Pit Viper which featured in the movie John Wick Chapter 4. https://youtube.com/shorts/MFCDVUKhNgg?si=2Y-i8hN6D7EhSqFO

@Ifield Yes. I've posted that I'd like to see a Buntline in .22, rifled barrel; and in fitting with this idea a detachable butt stock 

@William Brooks  https://www.youtube.com/watch?v=r1QjkUjQTaM&t=31s This is interesting for the non-airsoft 😉

Thanks Frank. That is a nice one. I have both the 320 and m17 in pellet CO2. Can never have too many right?😅

https://www.google.com/search?q=Revolver+Rifle&rlz=1C1PNFE_enBE1019BE1019&sourceid=chrome&ie=UTF-8#fpstate=ive&vld=cid:2829286d,vid:6zJQ2QIBn40,st:0 This would be nice 😍

Hey, anyone else have interest in seeing Barra produce a Revolver Rifle? I would like a CO2 version using the same cartridges as the current CO2 Schofield revolver. My preference would be for a .22...

@William Brooks  If I'm not mistaken it should be theSig Sauer ProForce P320-M17 FDE Blowback CO2 airsoftwhich can do both.

Thanks Frank and David. I appreciate the info. David, which AS uses both gas and CO2?