$67.99 Vermont Gage Standard Class ZZ Replacement Pin, Black Guard, Inch, NoGo (Half Sizes), 0.9340 
General Wire S-3F 3 Flood Guard / Standpipe Model - General Wire Item #430030 93122650031 | eBay
FDE Hunting handguard rail section aluminium m lok Flat Dark Earth ar15 handguard 1.33 ID ar 15 
