If you are planning to mount laser and like to use VTAC/BFG sling with a short bbl and handuard, the IUR is probably a safer choice than the M-lok (and key-mod too).
M-lok accessories cannot be attached too close to the base of the barrel ( due to lack of space) and therefore slots are not generally cut right up to the upper (because there is a barrel nut and threaded portion of the receiver) , this means the closest M-lok QD sling swivel must be mounted at least about 5-7slots from the upper.
If you put a QD sling swivel there, it can potentially interfere with your support hand. Not a problem if you have 12" hand guard and 16" barrel, but for a 9"hand guard with a 10.5 to 11.5 bbl, adding a flip up front site, a laser and a pressure switch there isn't much space left. the sling swivel could either be too close or in the way of your hand.
M-lok accessories cannot be attached too close to the base of the barrel ( due to lack of space) and therefore slots are not generally cut right up to the upper (because there is a barrel nut and threaded portion of the receiver) , this means the closest M-lok QD sling swivel must be mounted at least about 5-7slots from the upper.
If you put a QD sling swivel there, it can potentially interfere with your support hand. Not a problem if you have 12" hand guard and 16" barrel, but for a 9"hand guard with a 10.5 to 11.5 bbl, adding a flip up front site, a laser and a pressure switch there isn't much space left. the sling swivel could either be too close or in the way of your hand.


















































