*Includes 4" Tactical Rail Section (JPTR-LRC) 

   Specifications

   Length: Rifle (12.5” OAL) 
   Platform: Armalite AR-10, pre-2010 Bushmaster, Rock River LAR-8 or similar 
   Tube Style: Signature 

Machined from 6061 T6 aluminum with a 4140 steel barrel nut, this mid-length hand guard includes two JPHGS quick-detach sling studs.

Receiver Thread Pattern: 1 7/16 x 18 TPI 
Max. Compatible Barrel OD: 1.2" 
Inside Diameter: 1.75" 
Outside Diameter: 2” 
Overall Length: 12.5” 
Weight: 5.168 oz.(barrel nut) / 9.856 oz.(tube) 
Color: Matte black hard coat anodizing or custom color Cerakote

Large-frame MK III Hand Guard models make use of an eccentric nut design whereby the barrel retainer nut is not centered in the receiver extension. This allows use of the same smaller 2" tube as our small-frame hand guard models rather than requiring a larger diameter. At the same time, this design does cause the barrel to sit slightly below center in the hand guard tube. This is purely an aesthetic characteristic and does not affect barrel-tube parallelism or durability.

Tactical Rail Selection

All rails are anodized black regardless of any color option upgrade.

Four-inch accessory rail can be mounted directly (without backer plates) to the tube at the 6:00 position using the 10-32 flathead screws included with the rail segments.