FAQs

Find answers to our most common questions.

• CMMG Mk3 Platform Specifications
• CMMG Mk4 platform specifications
• What is a MkGs?
• What is a Mk57?
• What model firearms are legal in my state?
• What are the lead times on these new products?
• How do I return an item for repair?
• Are all CMMG products covered under the Lifetime Quality Guarantee?
• Who do I contact if I have questions about a product?
• What is CMMG's 9 AR Conversion?
• Will a 9 AR Conversion Magazine work in a blowback 9mm AR?
• What is a Mk4?
• What is a Mk3?
• What is a Mk9?
• CMMG Mk9 Platform Specifications
• What is a MkG?
• CMMG MkG, MkGs, & Mk57 Platform Specifications
• What handguards fit my gun?
• What is DI (Direct Impingement)?
• What is TB (Traditional Blowback)?
• What is Radial Delayed Blowback?
• Will the RipStock/RipBrace work on my gun?
• What does "ALL NFA RULES APPLY" mean?
• What is P3?
• What is Fastback Technology?
• Has the RipBrace been approved by the ATF?
• I bought a CMMG conversion kit, will it work in my gun?
• Does the .223/5.56 to 22LR conversion kit work in .223 Wylde chambers?
• What steps do I need to take to turn my conversion kit into a dedicated upper group?
• I’ve lost my owner’s manual, where can I find a replacement?
• How do I get a job at CMMG?
• How often should I clean my gun?
• Why does my magazine sometimes fall out?
• Who do I contact if my product is missing parts?
• Do you offer a Military or LEO discount?
• 10MM Case Bulging?
• Are CMMG .350 Legend magazines compatible with other manufacturers uppers/ARs?
• Is my CMMG firearm Direct Impingement or Radial Delayed Blowback?
• California Firearms Excise Tax