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Old 03-09-2012, 06:53 AM
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Any feedback for the JP yellow springs on the m&p15?
Good,bad,waste of money?

Light hammer stikes causing ftf's?

AR-15 REDUCED POWER SPRING KIT - Brownells

Last edited by Breechloader; 03-09-2012 at 07:49 AM.
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Old 03-09-2012, 08:53 AM
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5.56 NATO ammunition, such as M193 & M855, has harder primers than your average commercial SAAMI-spec .223 ammunition, so lighter springs could cause failures-to-fire.

Probably OK if you shoot nothing but (expensive) commercial ammo, but if you shoot military ammo, I'd leave things alone...

~Dan
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Old 03-09-2012, 08:58 AM
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I put the JP Enterprises yellow spring kit in a lower I assembled. It works fine.
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Old 03-09-2012, 10:45 AM
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I have them in both my M&P15-22 and my M&P 15-PSX and have had no problems
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