“WHITE Spring” STANDARD Power Buffer Spring. Equivalent spring load to a “fresh” Mil-Spec M4 Carbine Spring. This spring will perform reliably in any properly configured and maintained 5.56 Carbine, if you wish to maintain the performance of a “fresh” Mil-Spec load spring without concern for replacement. This is the best choice for shooters and purists that wish to maintain the performance of most factory supplied NEW Mil-Spec springs, but do not wish to be concerned with frequent replacement of same or do not have the time or inclination to seek enhanced performance options. The “WHITE” spring is recommended for 10.0″-11.0″ SBR’s with H2 Buffers, 1st Gen M&P’s, older RRA’s with under 18″+ BBL’s, early generation Colt 6920 LE’s, 5.56 & 6.8 SPC 7.5″-8.5″ BBL Piston Guns with H2 Buffers, with few exceptions, most .300 AAC Platforms, longer carbine barrels using intermediate or rifle length gas, and when training with SRTA and other low power and light charged “budget” rounds. Color Coded WHITE. [EXCEPTIONS: With SBR’s which are seriously overgassed firing suppressed
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