Shipping from 46324 This was a build I started to see how light a fully built Aluminum MK18 could be. I swapped the original G&P upper for the Viking Tactics upper because it fit better. The outcome of the build impressed me at 5.5lbs. It's never been fielded and is built to be indestructible. I build AEGs and will gladly link to my tech work feedback thread. Additional pics: https://imgur.com/a/f2XQC parts list: G&P Base Noveske Aluminum receiver (discontinued) $65 Noveske trigger guard Viking Tactics Aluminum upper receiver Daniel Defense AR15 Lite 2.0 12.5" Aluminum RIS US Forecon aluminum mock suppressor Magpul PTS MOE grip Magpul PTS RVG Bravo metal flip up sights -internals- Madbull Ultimate rotary hopup unit JB Unicorn 455mm 6.01 tightbore Maple Leaf bucking & flat hop nub Lonex A1 Super Shooter 7075 Aluminum CNCd gearbox w/ 9mm bearings ($99) G&P 18:1 gearset Retro Arms Aluminum CNC cylinder head Retro Arms Aluminum CNC air nozzle ZCI polished cylinder SHS 14t piston aoe corrected SHS M115 spring Lonex selector plate, Trigger contacts & motor tabs Handbuilt 3034 MOSFET, 16awg wiring Deans plugs Also included is a like new Valken 1600mah nimh battery wired to deans and a Tan KWA K120 w/ magpul. FPS: 384-387 w/ .2g Effective range: 6-7" grouping at 200ft RPS: 21 Weight: 5.5lbs $368 shipped It runs like a dream. selling cuz I have way too many m4s. PM me with any questions. Thanks for looking!