If you’re not familiar with CMMG, or you are, but never quite understood what CMMG Platforms were then we’ve got you covered! Our platform names are our way of differentiating the different types of AR platforms that CMMG offers, with the biggest differentiators being the magazine they accept, which then dictates what caliber they come in.
Choosing the right platform is a complicated thing for some people. It really comes down to what caliber you are looking for, and then what magazines make the most sense for you. For example, if you own a Glock 9mm pistol, you would likely be best served by running your 9mm CMMG in an MkGs platform so that you’d have magazine interchangeability between the two firearms.
The Mk3 is our receiver set that features a larger magazine well and wider receiver to accommodate larger cartridges like the popular .308 Winchester or 7.62 NATO cartridges. The Mk3 is currently available from CMMG in 3 different calibers with barrels ranging in length from 12.5" to 24" all dependent on if you choose a BANSHEE, RESOLUTE, ENDEAVOR, or DISSENT. An easy way to remember the Mk3 is to think three for 308.
The Mk4 is our receiver set that is based on the traditional 'mil-spec' AR-15 receiver set made popular by its chambering the popular .223 Remington or 5.56 NATO cartridges. The Mk4 is currently available from CMMG in 10 different calibers with barrels ranging in length from 5" to 20" all dependent on if you choose a BANSHEE, RESOLUTE, ENDEAVOR, or DISSENT. An easy way to remember the Mk4 is think "M4".
The Mk9 is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified magazine well designed to accommodate the popular 9mm Colt style magazine. The Mk9 is currently available from CMMG only in 9mm with barrels ranging in length from 5" to 16" all dependent on if you choose a BANSHEE or RESOLUTE. An easy way to remember the Mk9 is think original 9mm.
The Mk10 is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified lower and magazine well designed to accommodate Glock style 10mm magazines. The Mk10 is currently available from CMMG only in 10mm with one barrel length in the BANSHEE line. An easy way to remember the Mk10 is think 10mm.
The Mk17 is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified lower and magazine well designed to accommodate Sig Sauer style P320, P250, and M17/18 9mm magazines. The Mk17 is currently available from CMMG only in 9mm with barrels ranging in length from 5" to 16" all dependent on if you choose a BANSHEE, RESOLUTE, or DISSENT. An easy way to remember the Mk17 is think M17.
The Mk47 is our mid-sized receiver set that features a specialized magazine well and wider receiver to accommodate AK47 style magazines. The Mk47 is currently available from CMMG only in 7.62x39 with barrels ranging in length from 8" to 16" all dependent on if you choose a BANSHEE, RESOLUTE, or DISSENT. An easy way to remember the Mk47 is to think 47 for AK47 magazines.
The Mk57 is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified lower and magazine well designed to accommodate FN Five Seven style magazines. The Mk57 is currently available from CMMG only in 5.7x28 with barrels ranging in length from 5" to 16" all dependent on if you choose a BANSHEE, RESOLUTE, or DISSENT. An easy way to remember the Mk57 is think five seven.
The MkG is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified lower and magazine well designed to accommodate large frame Glock .45 style magazines. The MkG is currently available from CMMG only in .45acp with barrels ranging in length from 5" to 16" all dependent on if you choose a BANSHEE, RESOLUTE, or DISSENT. An easy way to remember the MkG is think G for Glock.
The MkGs is our receiver set that is based in size on the traditional 'mil-spec' AR-15 receiver set but with a modified lower and magazine well designed to accommodate small frame Glock style magazines. The MkGs is currently available from CMMG in two calibers with barrels ranging in length from 5" to 16" all dependent on if you choose a BANSHEE, RESOLUTE, or DISSENT. An easy way to remember the MkGs is think Gs for Glock small frame.
The Br3 is our new receiver set that is based on the use of a LR308 magazine well that has been modified to accommodate Remington 870 style stocks instead of the traditional buffer tube configuration. The Br3 is currently available from CMMG in 3 different calibers with barrels ranging in length from 16" to 20" and is a subset of the DISSENT line. An easy way to remember the Br3 is think the Mk3 for boomers.
The Br4 is our new receiver set that is based on the use of a traditional 'mil-spec' AR-15 magazine well but modified to accommodate Remington 870 style stocks instead of the traditional buffer tube configuration. The Br4 is currently available from CMMG in 7 different calibers with barrels 16" barrels and is a subset of the DISSENT line. An easy way to remember the Br4 is think the Mk4 for boomers.
