F JP Enterprises AR-15 Carbine Buffer Spring $20.25 JPS-OSC show more like this $8.99 Flat Rate Dirty Bird Industries F JP Enterprises Tuned and Polished Buffer Spring AR-15 - 416858 $20.85 JPS-OSC show more like this 5.00 MidwayUSA F J P Enterprises Ar-15/M16/308 Ar Tuned Buffer Spring - Tuned Buffer Spring, Carbine $20.85 JPS-OSC show more like this $12.50 Brownells