Oldish Lock flashlight night find

[Beeps in my sleep]

Got out of work and its dark. I strap on my head flashlight swing for a few minutes and find this. I know it is a lock so I didn't post it in the what is it forum. Couldnt find the shackle or the key. I can make out Guard on it and its got some serious weight to it. Excellent ammo for my slingshot if caught off guard by an intruder. Anyone know any info on this lock? Age ect? If not hey least its not a stinkin lincoln

 

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[Sawyer]

What kind of slingshot do you have??

 

[Beeps in my sleep]

lol cheap walmart one that was 7 dollars haha. I just figured if I was not near my guns this lock is heavy enough to do some serious damage. I go through sling shots like mad. Always break the bands. I use them in the winter to knock snow off branches of my trees so they don't have limbs come down and use it to knock large icicles off my roof so I don't get the 1000 ways to die treatment going to work in the morning