With the rifle in the "On Safe" position and pointed in a safe downward direction, release the magazine floorplate to its open position. Grasp the bolt operating handle and move it smartly to the rear, thereby extracting and ejecting any live round in the chamber. Detach the magazine clip from the hinged floorplate. Always visually inspect the chamber to make sure there are no rounds present. (See page 19 for instructions on removing and unloading the magazine).
Remove forearm: Loosen and remove the forearm swivel eyelet with small wrench by turning in a counter<lockwise direction. Care should be taken to prevent scratching the forearm. Grasp the forward end of the forearm and pull away from the barrel carefully until firm resistance is felt. Then slide the forearm forward and off. (The
The bolt and interior of the receiver should be wiped off with a clean rag. This is best done with the magazine floorplate open and the bolt in its closed position; and also with the magazine floorplate open and the bolt held to the rear by hand.
Any dried oil in these areas and on the magazine follower should be removed. Follow this cleaning by applying a very light film of oil on the affected parts Do not, however, pour large quantities of oil into the action. An excess of oil will run into the wood and cause it to soften or warp.
I Wipe all exposed metal surfaces with an oiled cloth, making sure to wipe gun clean of all finger marks where moisture will accumulate. Ordinary good judgment will, of course, indicate that the metal of the gun should receive a light film of oil any time the gun has been exposed to adverse weather or handling.
1iCLEANING INSTRUCTIONS To insure proper functioning of your BAR it should be periodically inspected and cleaned. Any time when sluggish or incomplete operation of the action is experienced while using commercial ammunition, the action should be cleaned. Generally, once forearm must be pulled away from the barrel so that the forearm will clear the bottom of the gas cylinder as the forearm is moved forward.) Note: The forearm cannot be removed unless the bolt is locked open.
Remove action bars and support rails-Close the bolt and pull the support rails forward and remove completely from their slots in the interior of the receiver. (See Figure 8) The action bars are removed by pulling their forward end away from the round connecting stud on the inertia piece, lowering and pulling forward out of the receiver. (See Figure 9)
Remove gas regulator from the forward end of the gas cylinder: Turn in a counterclockwise direction. (See Figure 10) Use a 5/8" wrench for this operation. (Note: The gas regulator will be very securely tightened in the gas cylinder, and care must be taken to firmly engage wrench used for removal.)
Remove the gas piston: The inertia block should be pulled back toward the receiver until rear face of the gas piston can be pushed forward out of the gas cylinder with a small drive punch. (See Figure 11) (Note: An extremely dirty gas cylinder and figure 11
gas piston may require forcefully moving the gas piston forward with a hammer and drive punch, and extreme care must be used to avoid scoring parts. If the gas piston will not move with moderate force, place a couple of drops of nitro-solvent around the gas piston, wait about 15 minutes, and then try to push the piston out with the drive punch. If the piston still will not move, put more nitrosolvent on the piston and allow it to set overnight before attempting to remove the piston.
Remove the inertia block, action springs, and action spring guide: Tightly grip by hand the rear portion of the action and action spring guide and pull forward toward gas cylinder until the action spring guide is clear of its recess in the receiver. The rear end of the action spring guide can then be moved to one side of the receiver and then rearward to remove the action spring, action spring guide, and inertia block. (See Figure 12)
The gas cylinder can now be examined for accumulations of residue. Residues in the gas cylinder and on the gas piston should be thoroughly removed with a good quality powder solvent or bore cleaner. If residues are heavy, they can be removed by scrubbing the gas cylinder with a 20
gauge shotgun bronze wire bore brush and a good solvent.
The gas piston, gas cylinder, and other parts covered by the forearm should be wiped with a very lightly oiled cloth after cleaning. The gas cylinder interior and the gas piston SHOULD NOT BE OILED beyond this.
Was this article helpful?