This is a stock adapter for a Havok 37mm launcher (picatinny mounted). It can accept regular Ar-15 prips and buffer tubes. - Added a linkage system so that Havok launchers can be attached a bit more secure. Also changed the grip part so that other grips can fit. You can install 2 257mm rails screwed together for sights and rigidity, recommended but not required. Included a partially modeled 'Havok' if you'd like to edit it. Printed Parts: -1x Stock Adapter -2x Links Metal Hardware -2x M4 Insert 6x6 -2x M4 Screw 10mm long -2x 257mm/25 Slot Rails Bolted Together -V2: Cleaned up model STEP Models not made by me... Grip: https://odysee.com/@AreWeCoolYet:7/Lil-Chonkers:2 Stock: https://grabcad.com/library/ar-15-adjustable-stock-1 LBRY Tags: havok; signaling; 37mm; 40mm; 3d2a