The Michaels Machines MM23E is a semi automatic1 clone of the HK23E Light Machine Gun. This belt fed gun is chambered for 5.56mm and feeds from standard M27 links.
Before you get your hopes up, I should point out that it is selling for just under $12,000 (at HKParts)! Although it should be noted that it is still cheaper than the Bushmaster ACR 😉
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It can be made legally fully automatic with a registered full auto sear … thats if you can find one for sale and can afford it! ↩