Free: Contests & Raffles.
the BC stuff works good but man its really picky and hard to get a nice smooth consistent color on the barrel. Ive done a lot of rifles with it but you really have to work hard at it.Theres another slow rust browning called Laurel mountain forge and while its slower and needs humidity/heat ( bathroom) it works very well and leaves a nice browned barrel. I like to take my barrels to a dark chocolate brown.