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In some cases, the folding mech requires two hands to unlock. Please see the following video: https://www.youtube.com/shorts/VPRxhhFafgs.

I’m having difficulty unlocking my FM-SM-1913 Folding Mech.

Stocks and Braces

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When will I receive my refund?

Shipping & Returns

Out of Stock Products

Is backorder available for out of stock products?

Can you manufacture a one-off product?

Where can I find reference images / videos of your products

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General Product Questions

What muzzle devices are compatible with my firearm?

What muzzle devices are compatible with my suppressor?

What is facemount?

How can I attach my Dead Air Wolverine to my firearm?

What’s the difference between KeyMount and KeyMicro devices?

Which devices are compatible with “X” caliber?

Why do some muzzle devices have a barrel length restriction?

How do I install KeyMount, KeyMicro, or X-Series muzzle devices?

Muzzle Devices

Which adapter(s) do I need to add a stock/brace to my firearm?

Which length stock/brace do I need?

Do you offer a stock/brace that locks in the folded position?

Do you offer a stock/brace that folds around a side mounted optic?

Which height cheek riser do I need?

Can I use your MMS Lower Handguard without the gas tube?

Can I mount an optic onto the MMS Gas Tube?

Do I have to remove my sling loop to install the MMS Handguard?

MMS (Modular Mounting System)

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Account Information

I’m local to you, can I pick up my order in person?

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My order was lost in transit or delivered to the wrong address

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Orders & Shipping

Is JMAC Customs a large corporation?

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Do you offer installation services?

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About JMac

Handguard Compatibility

X-Series Devices and Compatibility

KeyMount / KeyMicro Devices & Compatibility

Product Fit and Compatibility

I’m having difficulty unlocking my FM-SM-1913 Folding Mech.Updated 4 months ago