RLTW
“What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
URX4 are far easier to install with Knights gas block system as it is locked into place with a castle nut. If done correctly it does not need to be pinned. Anyone that has ever attempted to take off a BCM installed gas block knows this. All you need to do is properly dimple the barrel and use knurled cup tip screws with red loctite. Often times this type of setup will need to be drilled out.
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