No where on the package does it say "Rifle" they are labeled F.C. UMC and as mentioned in #3 the same color overall.
I use them on, the ROA, Walker by Uberti,1860 Colt by Pietta, 1858 Remington Navy by Uberti, Texas Paterson by Pietta. All of these guns have orginial factory nipples.They do fit loose on some, others I give a little push with a wooded dowel. My style of shooting is non-competitive, load, cap, raise the gun and fire six rounds, repeat. No walking around with a loaded piece, no waiting for a command to fire, no funny hand moves, load, cap raise and fire.
In the past 4 months, I've used close to six hundred now and at $2.99 a hundred and a 100% ignition rate, I'd have bought 10,000 but at my age I am hesitant about buying green bannans.
If fit was an issue I'd run them through the little set of pliers I made to size down #11 to #10. Did that with the first 100 and found it was not worth the effort.
Not saying there are the cats meow, gents, but for making the piece go bang they are a cut above tap-a-cap.
If any one lives in driving distance of Englewood Florida or East Providence RI I will give you a hundred, for a cup of coffee. PM me