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

code/modules/projectiles/guns/syringe_gun.dm

@@ -49,18 +49,18 @@
 
 	return 1
 
-/obj/item/weapon/gun/syringe/attackby(obj/item/A, mob/user, params, show_msg = 1)
+/obj/item/weapon/gun/syringe/attackby(obj/item/A, mob/user, params, show_msg = TRUE)
 	if(istype(A, /obj/item/weapon/reagent_containers/syringe))
 		if(syringes.len < max_syringes)
 			if(!user.transferItemToLoc(A, src))
-				return
+				return FALSE
 			to_chat(user, "<span class='notice'>You load [A] into \the [src].</span>")
-			syringes.Add(A)
+			syringes += A
 			recharge_newshot()
-			return 1
+			return TRUE
 		else
-			to_chat(usr, "<span class='warning'>[src] cannot hold more syringes!</span>")
-	return 0
+			to_chat(user, "<span class='warning'>[src] cannot hold more syringes!</span>")
+	return FALSE
 
 /obj/item/weapon/gun/syringe/rapidsyringe
 	name = "rapid syringe gun"
@@ -78,3 +78,29 @@
 	force = 2 //Also very weak because it's smaller
 	suppressed = 1 //Softer fire sound
 	can_unsuppress = 0 //Permanently silenced
+	
+/obj/item/weapon/gun/syringe/dna
+	name = "modified syringe gun"
+	desc = "A syringe gun that has been modified to fit DNA injectors instead of normal syringes."
+	origin_tech = "combat=2;syndicate=2;biotech=3"
+	
+/obj/item/weapon/gun/syringe/dna/Initialize()
+	. = ..()
+	chambered = new /obj/item/ammo_casing/dnainjector(src)
+	
+/obj/item/weapon/gun/syringe/dna/attackby(obj/item/A, mob/user, params, show_msg = TRUE)
+	if(istype(A, /obj/item/weapon/dnainjector))
+		var/obj/item/weapon/dnainjector/D = A
+		if(D.used)
+			to_chat(user, "<span class='warning'>This injector is used up!</span>")
+			return
+		if(syringes.len < max_syringes)
+			if(!user.transferItemToLoc(D, src))
+				return FALSE
+			to_chat(user, "<span class='notice'>You load \the [D] into \the [src].</span>")
+			syringes += D
+			recharge_newshot()
+			return TRUE
+		else
+			to_chat(user, "<span class='warning'>[src] cannot hold more syringes!</span>")
+	return FALSE

code/modules/projectiles/projectile/bullets.dm

@@ -190,7 +190,7 @@
 	name = "dart"
 	icon_state = "cbbolt"
 	damage = 6
-	var/piercing = 0
+	var/piercing = FALSE
 
 /obj/item/projectile/bullet/dart/New()
 	..()
@@ -201,15 +201,15 @@
 	if(iscarbon(target))
 		var/mob/living/carbon/M = target
 		if(blocked != 100) // not completely blocked
-			if(M.can_inject(null, 0, def_zone, piercing)) // Pass the hit zone to see if it can inject by whether it hit the head or the body.
+			if(M.can_inject(null, FALSE, def_zone, piercing)) // Pass the hit zone to see if it can inject by whether it hit the head or the body.
 				..()
 				reagents.reaction(M, INJECT)
 				reagents.trans_to(M, reagents.total_volume)
-				return 1
+				return TRUE
 			else
 				blocked = 100
-				target.visible_message("<span class='danger'>The [name] was deflected!</span>", \
-									   "<span class='userdanger'>You were protected against the [name]!</span>")
+				target.visible_message("<span class='danger'>\The [src] was deflected!</span>", \
+									   "<span class='userdanger'>You were protected against \the [src]!</span>")
 
 	..(target, blocked)
 	reagents.set_reacting(TRUE)
@@ -240,7 +240,28 @@
 		nodamage = 1
 	. = ..() // Execute the rest of the code.
 
-
+/obj/item/projectile/bullet/dnainjector
+	name = "\improper DNA injector"
+	icon_state = "syringeproj"
+	var/obj/item/weapon/dnainjector/injector
+	
+/obj/item/projectile/bullet/dnainjector/on_hit(atom/target, blocked = 0)
+	if(iscarbon(target))
+		var/mob/living/carbon/M = target
+		if(blocked != 100)
+			if(M.can_inject(null, FALSE, def_zone, FALSE))
+				if(injector.inject(M, firer))
+					QDEL_NULL(injector)
+					return TRUE
+			else
+				blocked = 100
+				target.visible_message("<span class='danger'>\The [src] was deflected!</span>", \
+									   "<span class='userdanger'>You were protected against \the [src]!</span>")
+	return ..()
+
+/obj/item/projectile/bullet/dnainjector/Destroy()
+	QDEL_NULL(injector)
+	return ..()
 
 //// SNIPER BULLETS
 

code/modules/uplink/uplink_item.dm

@@ -1299,6 +1299,13 @@ GLOBAL_LIST_EMPTY(uplink_items) // Global list so we only initialize this once.
 	cost = 2
 	restricted_roles = list("Curator")
 	limited_stock = 1 // please don't spam deadchat
+	
+/datum/uplink_item/role_restricted/modified_syringe_gun
+	name = "Modified Syringe Gun"
+	desc = "A syringe gun that fires DNA injectors instead of normal syringes."
+	item = /obj/item/weapon/gun/syringe/dna
+	cost = 14
+	restricted_roles = list("Geneticist", "Chief Medical Officer")
 
 // Pointless
 /datum/uplink_item/badass