The .300 RTC Double Stack 40 Round is an attachment for the M13 In Call Of Duty: Mobile.
Barrel: Various (YKM Integral Suppressor Light · YKM Integral Suppressor · MIP Light Barrel (Short) · MIP Light · MIP Extended Light Barrel · MIP Steady · OWC Ranger · OWC Marksman · RTC Extended Light Barrel · Rapid Fire Barrel · Built-In Silence Barrel · Long-Range Barrel · Sawed-Off Barrel · Extended Barrel · Light Barrel (Long) · Light Barrel (Short) · Taskforce Barrel · Reinforced Heavy · Cavalry Lancer)AK-47 only (Grip Barrel) · ASM10 (Branson) · HVK-30 (YKM Integral Suppressor Heavy) · Peacekeeper MK2 (Well-Forged Barrel) · AS VAL (MIP Quick Response Barrel · MIP 105mm Melee Barrel · MIP 200mm Mid-Range Barrel) · CR-56 AMAX (Gunner Stock · Intruder Stock · MIP Custom Long) · M13 (RTC Silencer Barrel · RTC Mini Barrel · RTC Heavy Long Barrel) · DL Q33 (.408 Standard · Free Floating) · M21 EBR (MIP Precise) · Arctic .50 (Assassin Short · 0.5 Light Long · Anti-Material Heavy · OWC Monolithic Suppressor) · XPR-50 (RTC Lightweight · RTC CQB · RTC Long) · Locus (YKM Lightweight Short · YKM Lightweight Long · YKM Standard) · Outlaw (MIP Tac Long · MIP Memorial Cowboy) · NA-45 · (MIP Custom Light · RTC Modified · OWC Tac Long) · SVD (RTC 660mm Heavy · RTC 510mm Light) · RPD (OWC Heavy Barrel · OWC Compact Barrel · OWC Extended Barrel · Cooling Compressor Barrel) · M4LMG (MIP Ultralight Barrel · MIP Short Barrel) · UL736 (RTC 12.4" Light Barrel · RTC 18.2" Short · RTC 25.4" Extended Barrel · LW Silencer Barrel) · S36 (Compagnie Generale Sevier - Light Barrel · Compagnie Generale Sevier - Short Barrel) · Chopper (Chopper Infantry · Chopper Special Forces · Chopper Heavy) · QQ9 (RTC Recon Tac Long · MIP Customized Light Barrel · MIP Tactical Barrel · Monolithic Integral Suppressor) · Striker (OWC Customized Heavy Barrel · RTC Retractable Barrel) · HS2126 (YKM Light Barrel (Long) · YKM Light Barrel (Short) · YKM Heavy Barrel) · MK2 (20.0 Forged Barrel · 18.0 Sport Barrel) · MW11 (.45 Tac Long · .45 Suppressor Light · .45 Compact) · J358 (J358 Custom Light · J358 Long · J358 Short)
Bowstring: 16 Bowstring · 28 Bowstring
Limb: Customized Limb · Enhanced Limb · Heavy Limb
Optic: Classic Red Dot Sight · Red Dot Sight 1 · Red Dot Sight 2 · Red Dot Sight 3 · Red Dot Sight 4 · Red Dot Sight 5 · Red Dot Sight 6 · Classic Holographic Sight · Holographic Sight 1 · Holographic Sight 2 · Holographic Sight 3 · Tactical Scope · 3X Tactical Scope 1 · 3X Tactical Scope 2 · 3X Tactical Scope 3 · 4X Tactical Scope · OWC 4.4X Tactical Scope · RTC 4.4X Tactical Scope · 6X Tactical Scope 2 · 6X Tactical Scope 3 · Thermal Scope (BR only)
Stock: Various (YKM Light Stock · YKM Combat Stock · MIP Strike Stock · MIP Stalker Stock · RTC Steady Stock · OWC Skeleton Stock · OWC Ranger Stock · Light Weight Stock · Marathon Stock · Agile Stock · No Stock)HBRa3 only (Thunderbolt Sling) · CR-56 AMAX (Psilos Light Stock · MIP Gatekeeper · Custom Strike · MIP Tracker Stock) · M13 (M13 Skeleton Stock · RTC Combat Stock · RTC Assault Tactical) · XPR-50 (YKM Ghost Stock) · MK2 (MIP Sport Stock · Custom Accuracy Stock · Cartridge Sleeve · Ultralight Hollow) · Renetti (Folding Stock · Control · Combo) · Crossbow (Watcher Stock · Ranger Stock · Archer Stock)
Laser: RTC Laser 1mW · 1mW Steady Aim Laser · MIP Laser 5mW · 5mW Combat Laser · OWC Laser - Tactical · Aim Assist Laser · YKM Laser - Ranger · RTC Laser - Merc · Tactical Flashlight
Underbarrel: Foregrip · Strike Foregrip · Merc Foregrip · Operator Foregrip · Ranger Foregrip · Tactical Foregrip A · Tactical Foregrip B · Elite Foregrip · OWC Foregrip · Infiltrator Foregrip · Patrol Foregrip · Field Agent Foregrip · SFOD Fast Foregrip · Red Cell Foregrip · Striker Foregrip · BO Foregrip · Piranha Foregrip · Quickdraw · Bipod · Heavy Handle · Crossbar · Stippled Fore Grip Tape · Granulated Fore Grip Tape · Rubberized Fore Grip Tape · Tactical Guard · Steady Guard · Underbarrel Stun Gun · Underbarrel Launcher · GRD-11
Trigger Action: Match Grade Trigger · Heavy Duty Trigger · Lightweight Trigger · Heavyweight Double-Action · Lightweight Single-Action · Lightweight Double-Action
Smoothbore: MFT Heavy Smoothbore · MFT Ultra Light Smoothbore · MFT Urban Combat
Guard: OWC Stable · OWC Commander · OWC Slim
Bolt: Light Bolt · Heavy Bolt · Sticky Grenade Bolt · Thermite Bolt · Gas Grenade Bolt
Ammunition: Extended Mag · Large Extended Mag · Drum Magazines · Fast Reload · SAS Mag Clamp · Fast Extended Mag · Fast Extended Mag B · Light Reload · Light Mag · Stopping Power Reload · MIP Stopping Power Reload · OWC Stopping Power Reload · Large Caliber Ammo · Halberd Mag · .300 RTC 30 Round Reload · .300 RTC Double Stack 40 Round · .300 5 Round Reload · .338 5 Round Reload · 15 Round FMJ · OTM Mag · 10mm 30 Round Reload · 5.45 Caliber Ammo · 5.56mm Mag · 7.62 40 Round Reload · M67 Ammo · .30 - 30 Ammo · Thermite Reload · FF Birdshot · Slug Reload · Fragment Ammo · High Explosive Ammo · Electromagnetic Ammo · 25x59mm Explosive Mag · 25x59mm Thermite Mag · FRAG-12 Explosive Mag · Anti-Vehicle Mag · .45 Hollow Point 12-R Mags · 9mm Hollow Point 12-R Mags · MacroMag IFS · Thunder Rounds