Here’s a truly unique ultra-cool way to cap off that retro rifle build or give any contemporary AR-15 a truly badass upgrade – the M203 37mm Launcher from LMT! An exact replica of the 40mm grenade launchers used by the U.S. Army since 1969, LMT’s M203 launches 37mm flare, smoke, or rubber ball rounds, making it completely legal for civilians to own, with NO FFL required. (The smaller caliber completely prevents the loading of military 40mm ordnance in this launcher.) Aside from adding an extra level of authenticity to a Retro Rifle, the LMT M203 37mm launcher can also be an excellent training tool for law enforcement and security personnel.

This 37mm M203 installs and operates just like its 40mm USGI big brother. Simply release the top locking lever, slide the tube forward, drop in the round, snap the tube back, and you’re ready to light up the night or lay down a smoke screen. LMT’s M203 attaches to either a standard M16A2 rifle barrels with a .625” front O.D. or an M4 carbine barrel with the grenade launcher cutout in front of the gas block, with a GI-type barrel nut at the rear.

• Shoot 37mm flares or similar rounds ONLY
• Fits AR-15 with M4 carbine OR 20" M16A2 rifle barrel contour
• 7075 aluminum, mil-spec hard-anodized finish, matte black
• Smooth-bore barrel WILL NOT accept military 40mm rounds
• 15" OAL
• 12" barrel
• 3 lbs. total wt.
• Mounting kits sold separately, see below...

LMT offers two mounting kits for the M203 37mm Launcher: a military-style kit that precisely replicates the original M204 military mount, including the replacement handguard (carbine and rifle models available) and a Quick-Detach mount that lets you easily remove the M203 from your rifle when you need it for other purposes (just as easy to reattach the launcher). 

These items are available to civilians as a transferable NFA item. Ask about our NFA Trust assistance programs.