[Big 3 East]: MGI Hydra New Full Length Handguard

At Big 3 East, MGI showed their latest prototype handguard for their Hydra modular weapon system. For those not familiar with the Hydra, you can change the caliber with out tools from .22LR all the way up to .50 Beowulf and that includes 7.62×39. Tool less barrel and bolt swapping is the easy part. The Hydra lower solves the limitations of the magazine well by having interchangeable mag wells. So now you can use an AK47 magazine to feed 7.62×39 into an AR15.


The MGI Hydras had one issue with them. The owner and designer is a bit old fashioned by using regular carbine length plastic handguards or picatinny rail systems. However the trend of AR15 handguards is full length small profile handguard that uses keymod or MLOK attachments. To solve the dilemma of choosing keymod or MLOK and any possible future attachment method, MGI partnered up with Sven of Manitcore Arms. Manticore helped MGI redesign the Manticore Transformer Rail system. The Transformer rail has interchangeable panels that you can select depending on your particular needs. So if you want Keymod and MLOK all on the same side of the handguard, you can.install them to your hearts content. And now it works with the MGI weapon system.

The MGI transformer rail is in production now and will be available for $299 as a separate accessory. No plans just yet to ship complete guns with this handguard installed by the factory. Removing the MGI Transformer rail does require one allen wrench.


For more information go check out their .

Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at nicholas.c@staff.thefirearmblog.com


  • Bear The Grizzly

    Is their rail system proprietary? Sorry if I missed it in the article. I don’t get why someone would spend 300 on a regular handguard.

    • The MGI upper can’t use off-the-shelf handguards because of its quick-change barrel system.

      • ostiariusalpha

        It should perhaps be pointed out that the Dolos quick-change system, mentioned in a previous article from today, can use some regular handguards.

    • ostiariusalpha

      The handguard’s Manticore Transformer Rail system is as modular as the Hydra rifle itself, it can be adapted to any attachment system with the interchangeable panels. You can even mix the attachment styles together, with a pic rail at the 6:00 front, a KeyMod at the 3:00 front, M-Lok at 9:00 front, and plain grip panels at all the rear segments. The Transformer Rail and MGI Hydra are a bit too modular for my own personal needs or wants, but I’m sure they might be an attractive option for those that find such modularity useful despite the higher initial cost.

      • Bear The Grizzly

        Thanks for the explanation guys.