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Any returns must have a Return Authorization Number.  See Shipping & Returns Page

Contact M4

The most efficient way to contact us is by email.  We monitor emails 7 days a week.

Please allow 24 hours for a response, but in general we respond sooner.  If you do not get a response within 48 hours we most likely did not receive your email, or we did receive it and it is in your Junk Mail box.  Please check your Junk Mail box, then contact us by phone or resend.

DO NOT SEND EMAILS WITH OVER 10MB OF PHOTOS.  Please resize any images to a reasonable size.  Emails larger than 10MB will not go through and, depending on your provider, you may not get a bounce back.

For customer service issues, please contact us at orders@m4sales.com

For Technical Support or Sales inquiries, please contact us at m4@m4sales.com

For Dealership inquiries, or group buys, please contact us at m4@m4sales.com 

Monday Phone and Email Traffic is very high due to the weekend.  Thank you for your patience.

Monday - Friday 9 a.m. - 5 p.m.

Phone:  818-717-8840

closed all Postal Holidays

disco at dumont

 Warehouse & Showroom
(pickup and showroom by appointment)
21356 Nordhoff St, STE 103
Chatsworth, CA 91311
Please only park in #103 or Visitor Parking spaces.
No Oversize Vehicles in the parking lot.  Oversize parking is avaialable outside the complex on Nordhoff St.  No Parking on Nordhoff after 4 P.M. due to anti-gridlock parking restrictions.
Postal Mailing Address
5023 N. Parkway Calabasas
Calabasas, CA 91302