A few "Whats it?" Finds from an 1800-present field

[CoilToTheSoil]

A few "What's it?" Finds from an 1800-present field

Thinking the one piece is from a (toy? ) gun? Not sure on the rest. Any ideas?
Penny for size reference
All items non-ferrous with the exception of the center piece.

 

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[CoilToTheSoil]

 

[markt67]

Nice finds top left looks like a cap for ox horn. Bottom left looks like half of a small truk latch. Far right is the but end of a pistol.the metal ring looks like a leather tack ring from a harness or the side of a wagon. Hope this helps.

 

[villagenut]

brass piece is half of a suspender buckle.

 

[ironhorse]

Large brass ball is from a horse harness
I'm with VN on suspenders buckle too

 

[CTwoods]

Look at what type of bottom inside hole is. Ox knob should be large diameter threaded hole, and should have one side tiny hole for a screw or nail, to keep it on.

 

[cudamark]

Top item looks to be a petcock (drain) off a radiator or similar.