Adds modified syringe guns

code/modules/projectiles/ammunition/special.dm

@@ -64,6 +64,25 @@
 		qdel(S)
 	..()
 
+/obj/item/ammo_casing/dnainjector
+	name = "rigged syringe gun spring"
+	desc = "A high-power spring that throws DNA injectors."
+	projectile_type = /obj/item/projectile/bullet/dnainjector
+	firing_effect_type = null
+
+/obj/item/ammo_casing/dnainjector/ready_proj(atom/target, mob/living/user, quiet, zone_override = "")
+	if(!BB)
+		return
+	if(istype(loc, /obj/item/weapon/gun/syringe/dna))
+		var/obj/item/weapon/gun/syringe/dna/SG = loc
+		if(!SG.syringes.len)
+			return
+
+		var/obj/item/weapon/dnainjector/S = popleft(SG.syringes)
+		var/obj/item/projectile/bullet/dnainjector/D = BB
+		S.forceMove(D)
+		D.injector = S
+	..()
 
 /obj/item/ammo_casing/energy/c3dbullet
 	projectile_type = /obj/item/projectile/bullet/midbullet3