this is a shortened version of CAR15 hand guards that will fit a pistol length gas system with a round hand guard cap. Comes as one piece, just print two copies.

This is a beta of a 7 shot, pump action, 37mm flare launcher. My model is built around an et cetera CM2037 37mm barrel, your may need to modify the design to fit your unique barrel. updated 3-23-24 -optional tri rail grip hardware required: -6-32 drill and tap set -1/4-20 drill and tap set -24" 5/8 x 5/8 aluminum rod (cut into 9.25" and 14.75" sections) -4" 5/8" round rod (cut to 97mm, one end rounded) -36" 1/4"-20 threaded rod (easier to cut after its been screwed into support holes) - 3/4" round aluminum rod (will be cut into a 1/4" thick section) -6-32 socket head screws --1" x8 --3/4" x9 --1/2" x7 -8-32 socket head screw, 5/8" long plus square nut - approximately 55mm long 7.4mm OD spring for firing pin return -approximately 36mm long 6.5mm OD spring for ejection port cover plunger -1/4-20 1 3/8" long hex head bolt for cylinder locking bolt -1/4-20 1" socket head screw for ejection port hinge -1/4-20 2" or longer bolt, head size is irrelevant because it will be cut off and ground into shape after being inserted. -OPTIONAL 1/2-13 threaded rod, 12" if you chose to print a buffer tube with the supplied model. AR15 specific parts -firing pin -Hammer, trigger, disconnect, selector springs and pins. -pistol grip (can be printed) -carbine stock (can be printed) -vertical grip -OPTIONAL carbine buffer tube (can be printed or the plug can be printed) i included files for two drilling jigs so that you can use a hand drill to drill pilot holes for the 6-32 and 1/4-20 holes in the aluminum rods. there is a jig for drilling and cutting the aluminum breach face. the 6-32 pilot hole drill is the right size to drill the firing pin hole. the is a copy of a 37mm round that uses a 209 primer to launch 3 15mm flares or scare cartridges. they are re-loadable. they use a hair rubber band in the channel to hold the 3 15mm shells in place. there is a copy of a 26.5mm to 37mm adapter i'll post updates soon.

this is an A1 slick side upper with a shell deflector and a pic rail. It uses a1 style rear sights. it would need to be CNCed in aluminum to work

this is a step file for a 3d printed hard resetting trigger. Mandatory parts: -mil spec semi auto hammer and spring -M16a2 Burst trigger and spring -ar15 disconnect spring -ar15 trigger pins -ar15 bolt catch spring -3/8" long 3/32 od roll pin (ar15 receiver) -1/2" long 3/32 od roll pin (psa receiver) -5/8" long 3/32 od roll pin (m16 cut receiver) -M16A2 LEFT 3 round burst disconnect OR M16a1 Full auto disconnect optional: -M16a1/a2/a4 3 position disconnect (all are functionally interchangeable) Note: this part may be printed, and will only work with M16 cut lower receivers. It would work with other versions if approximately 2mm of material is removed from the auto sear slot. consult the supplied files for reference. Note: you may need to file the front edge of the disconnector to make it work in semi auto mode. A full auto disconnector may need to be modified to work with a full auto selector, the back tip may need to be heated up and bent 1-2mm to the left. credit to Hoffman Tactical for the original design updated 9/22/2023: i fixed a defect in the AR1 housing.