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INSTRUCTIONS FOR MOUNTING FARRELL PRODUCTS
SCOPE MOUNT
You have purchased a very precise scope mount. The mount has been CNC machined
using materials that were processed to prevent warping during the machining
process. This does not mean that it will fit perfectly to your receiver. It may
be necessary to use an epoxy bedding, which we highly recommend to prevent
stressing or bowing of the mount or the receiver and to maintain the
straightness of the mount. In many cases you may not need anything, just mount
to the receiver with the four screws provided and tighten to specs and enjoy.
In some cases the 6-48 screws may need to be ground according to the amount of
threads in your receiver. Try to get the maximum amount of threads engaged in
your receiver.
SCOPE RINGS
A set consists of two rings completely CNC machined from solid stock. The rings
are machined in pairs and are serial numbered as machined and are absolutely
matched to within our standard tolerances of .005” of center line of our base.
In most cases our standard rings will clear a 50 to 56 mm objective bell,
according to Barrel diameter and MOA.
Standard Rings, 20 MOA BASE, 1.0 BBL
......................Bell Diameter.....................Gap
40mm..................1.920............................440
1.575...........2.070 w/parallax ring..........370
50mm...................2.250...........................312
1.968................w/parallax ring................240
56mm...................2.750...........................060
2.204.......................2.600.........................140
SHOULD YOU NEED TO BED MOUNT TO RECEIVER
Things needed:
2 part epoxy (JB Weld is only one of many on the market)
Release agent: 3 in 1 or a good silicone release agent to prevent mount and
screws from sticking to receiver.(3 in 1 sells a silicone lube at about $3.00
that works well.)
Q-tips to apply release agent and clean excess epoxy.
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Put release agent on screws and receiver
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Apply epoxy to bottom of mount between screws and on each side of screws
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Put all 4 screws in mount holes.
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Set mount carefully over mounting holes in receiver
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Thread down into the receiver
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Do not tighten the 2 outer screws. Tighten only the 2 screws next to the
ejection port. The outside 2 screws at this time is to prevent epoxy from
entering receiver holes.
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Clean excess epoxy from sides of mount using a thinner of some sort (paint
thinner, alcohol, or whatever will clean the excess epoxy). Q-tip’s work well..
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After epoxy has set up according to its instructions, you can now loosen and
then retighten all screws according to torque specs shown below.
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You now have a very flat mount with little or no distortion in receiver or your
mount.
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We can only speak for our rings. THEY SHOULD NEED NO LAPPING as our rings are
perfectly matched and when using the proper torque will repeat to each other
when tightened properly.
SCOPE MOUNT
Suggested tightening torque for front screw: 20-25 in/lbs.
Suggested tightening torque for all other screws: 20-30 in/lbs.
SCOPE RINGS
Suggested tightening torque for ring caps: 15-20 in/lbs. When installing the
cap screws they should have no resistance.
Suggest torque for rings to the mount: 55-65 in/lbs.
INSTRUCTIONS FOR FARRELL G-FORCE MOUNTS
With Adjustable Recoil Lug
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Make sure the recoil screw is not engaging the receiver before installing.
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Install the mount in same manner as our standard mounts. Tighten all 4 screws
completely. (Standard mount instructions supplied)
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Adjust the recoil screw until it engages inside face of the ejection port.
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Apply about 35 to 45 inch pounds of force to recoil screw and then back it off.
This will cause the mount to move approximately .002 to .003 rearward which
acts as a preload for final adjustment.
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Final adjustment; apply only 5 to 15 inch lbs. of force to recoil screw. At
this point there will be no more movement in any direction.
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It is advised to always recheck final adjustment at each shooting session, as
the lug will continue to seat better after each session.
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The 45 degree angle on the adjustable lug will cause a slight indentation in
the receiver. This will have no effect on the accuracy of the rifle, and as
mentioned will improve the seating surface with each shooting session.
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For those who do not have an inch pound torque wrench, make contact with
receiver using the 1/8 allen key. Now tighten 1/8 of a turn to pre load mount.
Back off the lug screw and re-adjust using only enough pressure to contact
receiver.
LINE DRAWING
Have fun and enjoy some great shooting
If you need further assistance, call 660-438-9456
Ken Farrell
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