I believe their 12# wire diameter is .030" and approx 18 coils in length. The heavier springs should be around .032". A slight diameter difference makes a huge difference in weight.
By the way....be sure to wear protective glasses if you decide to use the longer spring. It will become a high velocity projectile if you loose control of it. Don't ask me how I know this.
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Ret. LE, FA Instr, S&W Armorer
Last edited by armorer951; 07-05-2019 at 10:12 PM.
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