Product Overview
IRON CITY RIFLE WORKS S2 DROP-IN BCG C4V (GOLD)
DROP IN READY. THE S2 DROP-IN BCG IS OUR STANDARD WEIGHT BCG
556/223/300 BLACK OUT
THE C4V COATING HAS BEEN SO POPULAR WE HAD TO INCLUDE IT ON OUR S2 BCG.
C4V (TIN) PROVIDES EXCELLENT WEAR RESISTANCE WITH A HARDNESS OF 2600 VICKERS. C4V IS A (PVD) COATING (TIN), HOWEVER ONE LOOK AT C4V AND YOU WILL KNOW THIS IS NOT YOUR AVERAGE TIN. IT HAS A COEFFICIENT OF FRICTION 0.4 AND ONLY 2 MICRONS THICK MAKING IT A MAJOR IMPROVEMENT OVER MILSPEC. OUR TACDRIVER BOLT MADE OF SAE 9320 IS COATED IN BLACK NITRIDE
