Gen 6 King Competition 12 round shotgun shell holder

king competition
King Competition Grip Required
King Mounting Options

Create Wishlist

The King Competition MSH generation 6  is a high performance modular shotgun shell holder system, designed and manufactured by World Champions. 

All of our accumulated knowledge in top level shooting and engineering has been poured now in to the 6th generation of our design. All important features are upgraded. The shell retention is again improved, but release is still as smooth. The durability and the strength of the skeleton construction and parts will now handle so much more due to long lasting investment in much stronger materials and improved production processes. The shell adjustment range is longer. New guide system will make the shell package more uniform and less sensitive to imperfect shell dimensions. Generation 6 also utilizes the new adapter system, that connects directly to the skeleton, having very rigid and 360° rotation attachment to TEK-LOK or ELS systems. Weight is reduced from previous generation.

Shells are staggered for right- or left-handed grip and are spaced with minimum distance to each other. Required belt space is also minimized. Positioning of the shells is absolute uniform through the rig and allows for consistent use of all modern shotgun loading techniques and for example mixing load-2 and load-4.

Shells are held tightly within the geometry of the holder. The short release is done by detaching the upper shells from high strength magnets. This releases the shells from the holder completely, allowing a very effortless and fast reloading. When not reloading, the system will keep the shells securely in place during running and jumping.

Each unit in the rig is independently self-leveling and allows the user to switch between all typical 12/70 cartridges. If needed, the spring tension and travel is easily adjusted by rotating the main bolt. But the standard setting will allow the user to switch between all normal competition cartridge types without touching any adjustment.

The skeleton construction makes the system very rigid and allows mounting directly to the several skeleton links with a large steel M6-thread. The rig can be mounted with bolts, hook&loop or with a adapter. All mounting hardware is supplied with the rig (adapter not included in sizes ASSM20 and bigger).

The skeleton construction and backing plate is curved on a angled axis. This allows for the larger assemblies to curve around the users waist and carried in a angle for optimal reloading with a competition shotgun belt, without the last shells exceeding the IPSC 75mm rule. Please note that using adapter for pistol belt mounting on ELS or TEKLOK system can exceed the 75mm rule and is not recommended for IPSC use.


Technical specifications:

- Cartridge maximum distance to backing plate mounting face: 57mm (add belt thickness for total distance to body)

- Useful total shell height adjustment range 33mm, useful self-adjustment range ( tensioned spring travel) 13mm

- Weight ASSM4 (135g), ASSM8 (260g), ASSM12 (390g), ASSM20 (670g), ASSM28 (940g), ASSM32 (1170g)

- Mounts with included hook and loop, M6-screws or adapter (adapter not included in assemblies size 20, 28 or 32) 

- Maximum storage temperature +80°C

Product Reviews

Score: 5 out of 5 (based on 21 ratings)
leave a review
best shell caddy in existence.
Written by Justin Wendorf on May 8th 2024

Like the subject line says, best shell caddy in existence. Easy to set up, holds the shells beautifuly.

Simply the best
Written by Alex W. on May 5th 2024

Its the best, there are no other shotshell holder that do it better than King Comp. Thanks Hayes Custom!

King shotgun shell caddy
Written by Shannon Carlton on Mar 24th 2024

Simply the best caddy on the market and Hayes customers top shelf

King Comp’s
Written by Rusty on Mar 21st 2024

Amazing product. Definitely taken the time to adjust small upgrades time after time. Version 6 now I believe. Since getting the 8 & 12 shot holder, I’ve been able to take my reloads to a whole new level. Can now quad load without hiccups as the room behind the shells for grip and the almost full brass end for thumb placement allows me to properly grip all 4. I’m so happy I ordered them - to Canada!!

Gen 6 King Competition 12 round shotgun shell holder
Written by Austin on Feb 22nd 2024

This thing is the GOAT of all shotgun shell holders. Don’t even hesitate, buy two or a left hand and right hand you won’t regret either

Gen 6 King Competition 12 round shotgun shell holder
Written by Allen on Nov 18th 2023

Excellent product. Very well made, easy to set up, and works better than described. This makes doubles and quads effortless and stays secure when you moving. Fast shipping and good instructions available. Worth every penny at match time.

King Competition 12 shell caddies
Written by Zach on Oct 25th 2023

These are phenomenal and I’ll likely buy more down the road.

The Best
Written by Carl Hamby on May 31st 2023

These are stupid expensive …. However, they are the best. Shells are held very securely and don’t go flying every time you bump them.

King Competition 12 Shell Caddie
Written by Sean Mullins on May 18th 2023

This thing is straight gangster! I have bought and used just about all of the brands and types you can think of for 3 Gun over the last few years. Stop looking around you should buy this one! Also, Hays custom is great to work with!

Great Shell Holder
Written by James Moody on Apr 3rd 2023

By far the easiest Shell Holder to use and learn to use.

Gen 6 King 12 rnd shot shell holder
Written by Marian on Dec 24th 2022

Built to withstand abuse, easy to configure and lighting it.

Very nice
Written by Gabriel on Nov 7th 2022

This unit is very functional and reliable. Adjusting to fit ones rig is fairly simple and is the best caddy I've used in the field.

Written by John Tschetter on Jun 16th 2022

Ordered Left handed for my son and right handed for myself, both performed flawlessly.

Kings shell caddy
Written by Jamie on Jun 11th 2022

Super fast release awesome retention on shells.

Best Caddy
Written by Brandon D Heard on Jan 15th 2022

The footprint for the 12 round caddy is relatively close to the footprint of an 8 rounder from other manufacturers. The retention is amazing and adjusts itself to the type of shell you're using. The construction is top of the line and 2nd to none. This is the best caddy for them game.

Great 3-Gun Holster
Written by Fifi R. on Oct 22nd 2021

I literally ordered this right before a competition. I've seen a few other people I shoot with have it and decided to give it a try. I was not disappointed at all. Easy to add the ELS clip to it and it held my shells tightly even through heavy movement but easy to grab and remove. I would highly recommend it. Also...I have to highlight the super fast shipping!

End User?
Written by undefined on Feb 20th 2021

Very nice shell holder for quad loading. I prefer this over the non-spring loaded holders as the tension is very consistent.

The best caddy
Written by Sky Yang on Oct 12th 2020

From my test, it has the easiest shell release out of Invictus, Safairyland and Taccom. And the shell are so tight together it has a very solid feeling when pulled out. The only thing I don't like is it is only optimized for one hand, unlike the others. I think for that price it wouldn't be very outrageous to ask them include an alternative backplate for other hand.

Gen 6 King comp 12 shell caddy
Written by Jeremy on Aug 17th 2020

Love it!!!

Quality product
Written by T on Mar 23rd 2020

Product holds shells securely yet allows for quick release by user. Does not come with attachment point for belt - must purchase this seperately.

Best there is!
Written by Alex on Dec 27th 2019

I have used almost every caddy on the market and this is hands down the best there is. Easy pull, great retention, small footprint on the belt, and it shipped super fast. I can’t wait to pick up some more.