If there are some AEGs that you want installed with the shoot and recoil technology of Tokyo Marui, Echigoya may just do it for you. They just made a custom M16A4 that is fitted with a G&P grenade launcher with LMT markings, a collapsible front sight, and 20 inches outer barrel. Since this is a custom gun and costs US$1,190 per custom order, you may just to have wait longer before it gets shipped to you. Better contact them on how ordering can be placed for such custom work.

"Magazine: 82 Rounds
Barrel Length: 20 inches outer barrel
Weight: 5370g
Battery: Not Included
Muzzle Velocity: 260-280 FPS with 0.2g BBs
Package Includes: Gun, Manual, Magazine & Charger Adapter.

Features:

• Realistic Shoot & Recoil system
• Colapsable Tactical front site
• CNC one piece hard Steel 20 inches outer barrel
• G&P Granade Launcher
• Metal Body
• Auto Stop system
• Functional bolt stop

Contact us for Pre-order."