SBI Model C-71 Long Range Barrel and Rail Install

The C-71 Long Range is an innovative high precision 10/22 receiver CNC machined from billet aluminum. The receiver has a 20moa to 50moa mil-spec picatinny rail and is compatible with all picatinny rail optics mounts. The receiver accepts all Ruger 10/22 components and is compatible with all Ruger 10/22 stocks and barrels. This set of instructions will cover installing the barrel and rail on the Model C-71 Long Range

You will need the following:

• Model C-71 Long Range 10/22 Receiver
• Model C-71 Long Range Rail
• 2x #12-24 3/4" Socket Cap Screws
• 4x #8-32 3/8" Low Profile Socket Cap Screws
• 10/22 V-Block
• 10/22 Barrel
• 3/32 allen wrench or bit
• 5/64 allen wrench or bit
• 5/32 allen wrench or bit
• Torque driver

Insert the barrel shank into the receiver. Align the barrel correctly. Tighten the barrel lock screw and torque to 25 in-lbs. Medium strength (blue) Loctite can be used if desired.

Install the v-block. Torque v-block screws to 30 in-lbs. Do not over torque. An adjustable v-block can be used, but is not necessary.

This is a good time to check for barrel droop. Barrel droop can be caused by over torqued v-block screws.

Place the rail on the receiver. This may be a snug fit. Install the 4 rail screws finger tight.

Torque the screws to 18 in-lbs in the following order:

• 2nd from front
• 3rd from front
• rear
• front

Repeat torque procedure.

Your rail and barrel are now installed. Complete the remaining assembly in the same way as any other 10/22.