Good enough - VISM M-LOK Handguard, for AR-15/M4

i bought both this one and the extended carbine length one. Honestly, these are exactly what i feel like i need. the only problem is that, and its been mentioned in a previous review, that the handguard does not fit firmly on the gun. it can be pulled to the rear about 2mm which does not allow it to hold zero for lasers or forward mounted optics. outside of those 2 things though this rail is perfect for a replacement for the standard round handguards.