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Will this spring work for .556 cal or is it only for 308? — 4 Answers

by Matt Ohmann, from NY, United States Asked on February 13, 2019

Name JP Enterprises Tuned And Polished Buffer Spring (4.8)
$21.95 $20.85 Save $1.10
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Answered by Ethan C., Gear Expert, from IL, United States, on June 18, 2019

These are the AR-15 springs for .223/5.56 (as well as similar calibers such as .300 Blackout). You can find the .308 version here: https://www.opticsplanet.com/jp-enterprises-308-tuned-and-polished-buffer-spring.html

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Answered by Aggieman12, member, from TX, United States, on April 05, 2019

JPS-OSC and JPS-OSR are solely 5.56 springs. The .308 variants’ model numbers end in “308”.

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Answered by Brad, member, from VA, United States, on March 18, 2019

The product description seems to be referencing the OSC.308 item. This item at $18.79 appears to be for 556, the part which ends with OSC.308 is $2 more and seems to be for a 308.

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Answered by Tim Houck, member, from FL, United States, on March 01, 2019

Per the model numbers provided and referenced off of JP Enterprises website both models are for AR-15.

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Last updated 2025-11-12 UTC.