Only the Costa handguards have attachment points on top (left and right) for these picatinny rails to screw on

Nur kompatibel mit Magazinauslösern in Standardgröße

d) Three holes on top strut to attach the M-LOK accessory panel

CNC machined in-house to the strictest tolerancesBuilt from the toughest 7075 grade aluminum and Type III anodized to military specifications to insure the toughest

Accurizing Kit für Ruger MK IV und MK IV 22/45 # Topseller Only the Costa handguards haveThe complete drop in kit comes complete with a CNC Machined Disconnector, Target Hammer, Hammer Bushing, Target Sear, Target Trigger with plunger and spring. It also comes with pretravel and overtravel adjustments and includes medium strength Loctite to secure the adjustment screws. The Accurizing Kit for the Ruger MK IV will provide a crisp, clean 2. 25lb trigger pull. This kit will eliminate the magazine disconnect. SpecsThis kit fits all variations