9mm RADIAL DELAYED BLOWBACK with your AR: CMMG Upper and 9mm ARC Magazines
Want to shoot 9mm from your AR with out a dedicated 9mm lower or an expensive magazine adapter? The CMMG…
EndoMag Insert Converts Your AR Lower to 9mm
The Mean Arms EndoMag makes a big claim. They say their magazine insert converts your Gen 2 or Gen 3…