5.56x45mm NATO Upper Receivers

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Yorktown Cerakote

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS R-ONE M-LOK Handguard - PA Gazette Cerakote

Aero Precision M4E1 Builder Set w/ 15" ATLAS S-ONE M-LOK Handguard - PA Gazette Cerakote

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - PA Gazette Cerakote

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - OD Topographic

Aero Precision M4E1 Builder Set w/ 9" Enhanced M-LOK Handguard - OD Topographic

LANTAC Raven Billet Side Charging AR-15 Receiver Set - 1-RV-SET-SC-RAVEN

Aero Precision AR15 16\" 5.56 Carbine-Length M4 CHM/PH Barrel Complete Upper 13\" Slimline Handguard Left Handed - Anodized Black - APSL100709

Aero Precision M4E1 Enhanced 10.5\" 5.56 No Forward Assist Complete Upper Receiver with 9\" M-LOK Handguard - Anodized Black - APAR612275M2

Dd 14.5'''' M4a1 Fsp Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Fsp Upper W/ Exps3-0 Holographic Red Dot

Dd 14.5'''' M4a1 Fsp Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Fsp Upper W/ Exps2-0 Holographic Red Dot

Dd 14.5'''' M4a1 Somcom Upper Receiver W/ Eotech Optic - Dd 14.5'''' M4a1 Socom Upper W/ Exps3-0 Holographic Red Dot

M4a1 Block Ii Tribute Bundle

M4e1 Complete Piston Upper With Strike Eagle - 18'''' Piston Upper With Vortex 1-8x24mm Strike Eagle & Mount

Rebel 16" 5.56 AR 15 Upper With 12" Quad Handguard

Dirty Bird 16" 5.56 NATO Govt M-LOK AR-15 Complete Upper Assembly V3 - OD Green

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - OD Green

Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - FDE

16" Slick Side Billet 5.56 416R Stainless Midlength 1:7 M-LOK Complete Upper

20" 5.56 Phosphate Rifle M-LOK Government Upper Assembly

20" 5.56 Phosphate + Chrome-Lined Rifle M-LOK Heavy Upper Assembly

Ballistic Advantage AR-15 Complete Upper, 16" 5.56 Hanson Midlength Barrel w/15" Logic M-LOK Handguard

Black Rain Ordnance SPEC15, 5.56mm, 10.5 Barrel, 12 Handguard OCL Polonium 556 Suppressor Complete Upper

Black Rain Ordnance SPEC15, 5.56mm, 10.5 Barrel, 15 Handguard OCL Polonium 556 Suppressor Complete Upper