Great condition, mainly used for training. Will also ship with original LM4c parts and other parts on gun( classic M4 stock, hanguard, triangle sight, etc.) Customizations: None internally but lubricated after every use. External: 13.5 inch Centurion Arms MLOK rail. PTS Flat Dark Earth pistol grip PTS Enhanced Trigger Guard Magpul MOE stock (mil spec) PTS MLOK Handstop Mad bull barrel extension Madbull flip up sights Will also come with 2 mags, KWA LM4 mag, and PTS Emag. Also a PTS Ambi selector switch and a Radion Raptor Ambi charging handle. Shipping is free and shooting vids are available! Willing to negotiate!