CMMGReviews of cmmg.com

The machining on the firing pin was garbage. This is from an engineer and machinist.

Does not work with PSA uppers,

Product seems good, but shipping and using usps is the worse possible choice of shipping. Takes almost 2 weeks to get delivered. No option for express delivery still waiting for my package after 11 days after ordering

So I checked your specifications for the 45 acp banshee, and on the page for the 8 inch barrel 45 banshee it states that the barrel threads are 5/8x24. So I ordered the rbb 5/8x24 and am surprised to find that the rbb doesn't fit the barrel of the banshee, because the barrel of the banshee was changed to .578x28, and yet you dont seem to offer an rbb in .578x28. And infact the suppressor i ordered that is supposed to direct thread to the gun cannot thread on because the change is not listed on the banshee page. So bit of a fail on your part there. And as I want to use plan b mounts for my build, I now have to buy a third party part to install on your gun.

Terrible experience told me my package would be here TODAY and still havent received it I suggest anyone getting products from this scam company to get their money back ASAP

It’s been over a month and my order is “unfilled” and I haven’t been updated since I placed the order.

It’s been over two weeks since I placed an order. Placed the order on 9/11 and it’s now 9/26. I just received an email that only part of my order has shipped, but the tracking number provided doesn’t say which carrier you are shipping with. I have check USPS, UPS, and FedEx, none of them recognize the tracking number provided. I can’t get anyone on the phone and I’m waiting for an email response. I have no other choice but to give you all 1 star at this point. Word of advice, don’t ask for a rating so early into the process, especially when the customers haven’t even received the parts that were ordered. Also, the date that keeps automatically populating on this review is September 11, 2026. The actual date today is September 26, 2026 at 2:30pm CDT.

Shitty service. Not even a phone number to contact. Ordered a mk57 upper to replace the original mk57 upper that blew a case inside. So contacted them via email, because they dont have a damn phone number to reach out, they told me I could return it and they would check it out. But when I sent them tons of pictures of the inside of the upper they are trying to say it is the ammo. So I decided screw it I'll just order another so I dont have to deal with the BS with them. You would think being they are the manufacturer they would keep in stock, but apparently it takes 15-30 days to complete a damn order. I should have just ordered one off of buds gun shop for like 200 bucks less and it would have been here already.