natedog,
I see you are in CA , I honestly don't know about your reg's out there.
I'm in AR.
Since this is under Federal Jurisdiction, which also mean a State offense occurs - It ain't worth it. Honest , folks take these plugs out all the time - come Doveseason here is a mad scramble for plugs.
Folks go into gun shops where they do business, and the owners remind their good customers - they will give them one. Heck, some gun shops where folks buy cases of ammo ....tape a few to the outside of the cases. Many gunshops will make them and paint orange ....
Here In AR the guns shops have them on the shelves for sale, Gas stations, WM, everywhere...The folks that lease lands and guide hunts ....keep them for the clients.
Being Federal - it ain't worth it. It is a $3 item at the most. We all have used "get by " plugs. Now some places have "nicer" more "hunt friendly" areas than others....some areas are LOOKING to bust you.
Winchester 1400 by design Will only hold 3 shells total . One chambered - two in mag. You CANNOT put a plug in a 1400. A couple of folks almost got busted for NOT having a plug in their 1400. These folks were nice and happend to cite the REGS....that part about gun not being able to hold more than 3 shells total.
These wildlife officers ... were looking to bust folks. They interpretated the law to mean "factory plug"....they really didin't know or used their inttrepretaion for their purpose . See they confiscate guns, trucks, cars, boats....and auction this stuff off. Too many folks have attended auctions and paid too much to get back a sentimental gun in the family. One guy lost his wife's new SUV , boat, motor , trailer, His late Uncles shotgun...hunting privledges for 3 years....and a marriage before it was all over. He was wrong, he shot without a plug ( then tried to fashion one as the blue lights converged) during a break in the season, and didn't know it , but "technically" he tresspassed, and the area was termed legally "baite".
NO offense...but folks we have folks that DO NOT like guns, hunting or hunters. We have political games at play. You have to be VERY Prudent in some areas...If that means buying a Factory plug at a 24hr gas station at 2 am for $10 - do it. Sure you got screwed. Check that field and KNOW the guides reputation and that of landowner. You have "kinfolks" that have deeds/ titiles to property that will go out and 'bait a field" ....just to set folks up.
Sorry for the rant - I am ethical . I do it by the book. I have left "clubs and leases" that were unethical and unsafe. I have shown up on an invite, walked in ten steps and I knew - this was not a"legal" field and I left and did not hunt. 2 hrs drive to and 2 hrs back.
It ain't worth it. It ain't worth for too many reasons, least of all to save such a minute amout of money.
Heck I used to keep 6 or 8 in my vehicle, just in case folks needed one. I gave a small town LEO one in OK once , inherited a gun without one, buying ammo at a gunshop...he was inquiring about one... Sheriff deputy I gave another in TX...his "boy" had used the gun without permissions and removed it. WE always check everyone before we head to the field...plugs, license, HIPP , everything to be legal....