Bosch PR20EVSK User Manual download pdf (Page 7)

www.ModulusArms.com

October 20, 2014

www.ModulusArms.com | AR-308 Jig Instructions

Figure 7: Example of common tools that can be used to complete the lower (AR-15 jig shown)

Modulus Arms Jig: General Assembly Instructions

Front Support: The front takedown pin from your lower parts kit is used to secure front support as

shown in figure 8 in the same way the pin is used to secure an upper.

Figure 8: Install front take down pin and use it to secure the front support like an upper

Rear Support: Thread in the buffer support (clockwise) until the buffer support is below the rear surface

of the lower (figure 9), then further turn clockwise until the two screw holes are at 12 o’clock. Cap

screws can be partially threaded into the buffer support for additional leverage. Using the cap screws,

attach the rear support (do not tighten the cap screws). Make sure the buffer support is recessed so that

the rear support touches the back of the lower for proper alignment.

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Bosch PR20EVSK User Manual Page 7