ok so this is my lego working gun design for your problem sneakySasquatch_90, explanation in the comment section : r/legoguns
LEGO firing mechanism building instruction video - YouTube
AMMO: nine bricks WIDTH: 34.13/8.47 cm The Thriller Advanced projectile: a 4×1 brick, a plate, and a tile The retractable bow:
Rubber band gun from BrickLink Studio
Sariel.pl » firing mechanism
Smith & Wesson M1917 (1:1), a LEGO Brick Replica – Brick Replicas
How to Build the Lego Technic Gun (MOC - 4K) | youtu.be/STCk… | František Hajdekr | Flickr
Lommer Technics - Bloques de construcción de pistola, 796 piezas UZI submáquina Blaster con balas, juego de construcción militar, compatible con Lego Technic : Amazon.es: Juguetes y juegos
LEGO MOC Anti-Aircraft Gun by kueden | Rebrickable - Build with LEGO
AMMO: nine bricks WIDTH: 34.13/8.47 cm The Thriller Advanced projectile: a 4×1 brick, a plate, and a tile The retractable bow:
Automatic Lego Gun - YouTube
Working LEGO Pistol V6 +INSTRUCTIONS - YouTube
2 Simple Lego Technic Guns - Instructables
LEGO MOC Shooting Mechanism by kueden | Rebrickable - Build with LEGO
Working Lego Technic Revolver : 3 Steps - Instructables