BEFORE INSTALLING ON THE LT. SIDE OF THE RECEIVER (1) DEGREASE INSIDE THE FRAME HOLES, THE TUBE INSTALLATION TUBES, & BOTTOM OF THE TUBE WHERE IT CONTACTS THE SIDE OF THE RECEIVER (2) PUT A DROP OF CLEAR NAIL POLISH ON THE RECEIVER MOUNTING STUDS & PAINT A BEAD ON THE REAR SIDE OF THE PLUNGER TUBE (3) CAREFULLY POSITION ON THE RECEIVER & PRESS IT FIRMLY INTO PLACE USING YOUR FINGERS (4) AS YOU FLARE OUT THE ENDS OF THE MOUNTING STUDS SOME OF THE NAIL POLISH WILL OOZE OUT AROUND THE EDGES OF THE TUBE. MOP UP THE OOZE-OUT WITH COTTON SWABS (4) RECHECK THE FLARE TO ENSURE IT IS TIGHT & MOP-UP 1 MORE TIME ANY OF THE CLEAR POLISH THAT RUNS OUT (5) GO SET THE RECEIVER OUT IN DIRECT SUNLIGHT/HEAT WITH AN ELEC. HAIRDRYER TO HELP THE CLEAR POLISH CURE FASTER. LEAVE THE RECEIVER UNDISTURBED FOR SEVERAL HOURS/OVERNIGHT. THAT PLUNGER TUBE AIN'T GOING ANYWHERE------OORAH & SEMPER-FI !!!!!!!!