Arca-tinny Full Length Rail for PRI Rifle Length Handuards

Coming Soon! Estimated December 2025/January 2026 

No Preorders/Presales - Sign up for the email list for new product announcements 

Full length Arcatinny rail for Precision Reflex Gen II & III Rifle Length (12.5 in) handguards. 

Ditch the hog saddle - keep your broom handle- Long bottom rail picatinny with an integrated arca. 

This rail was designed and produced with the idea of bringing the MK12 Mod 0 and Mod H into the modern precision shooting world of arca rail integrated chassis and handguards, while keeping your standard picatinny mounting that you know and love. Machined to fit a 1.5" RRS dovetail, you will find you can mount your handguard directly to your tripod, ditching bulky saddles and ridding yourself of arca adapters. 

• Machined from 6061 T6 aluminum 
• Anodize Finish or Cerakote Finish
• 10 in x 1.5 in x 3/8 in 
• Weight - TBD 
• Mechanical stop - 2x 10-32 Screws
• Includes All Mounting Hardware 

Available in Black Anodize and H265 Flat Dark Earth 

Note: Arca Rail does not fit any Large Platform AR (AR10/308) handguard from PRI. 

To install, simply remove the picatinny sections and nut plates from your PRI handguard. You may also need to remove an inner heatshield depending on your build. Remove all the screws on the bottom of the handguard, do not remove any on the collar. Heat shield is made of a light, springlike material, so it may require a little bit of patience to fully remove.