M&P-15 Upgrades: How to Remove Your Gas Block, Install Free Float Handguard + Trigger & Bolt Catch!
AT3 Tactical Knowledge Source: Beginner's Guides; AR-15 Tips; AR15 Tricks; Guns & Gun Building AR10 AR-10
THE BADDEST AR IVE EVER SHOT!
KennyReviews
RUGER AR-556 WHITE TALO : 1ST SHOTS AT THE GUN RANGE PICTURE-IN-PICTURE + DUAL AUDIO & SHOW-N-TELL!
SpaceCadetTV