Maple leaf 590mm 6.04 Crazy Jet Inner Barrel for MARUI VSR-10 FN-SPR VFC M40A5 - Skirmshop
PSA “premium” build (FN barrel) on top, BCM on bottom. I actually prefer the PSA believe it or not! FN lines their barrels with ground up fairies apparently. : r/ar15
FN USA 5.56 20" M16-A4 Barrel 1/7 4150 CL w/ FSB - TNTE Sales Inc.