How to Guide
PRi Forearm Assembly with a Front Sight Post
Items you will need to complete the job.
Installation Instructions
Step 1
Place the receiver in the receiver block then clamp into a vise. Install barrel by pushing the barrel all the way in with orentation pin in the receivers notch.
Step 2
Apply a small amount of anti-seize paste to the receiver's threads.
Step 3
Install the barrel nut and the forearm collar. Turn the barrel nut all the way down until finger tight. The forearm collar should be loose.
Step 4
Using a barrel torque wrench, tighten to 40-50 ft. lbs. and loosen the nut on the receiver 3 times. The 4th time you go for exctly 40 ft. lbs. on the torque wrench.
Step 5
Check the gas tube port alignment on the receiver with the port on the barrel nut. If alignment is not correct you will need to tighten to a maximum of 65 ft. lbs. or loosen the barrel nut and start over to get proper alignment.
Step 6
Position the forearm on the barrel then start to feed your front sight with gas tube into the receiver. Start turning the forearm into the collar and work the sight into position. The orientation pins inside the collar will align the forearm into place.
Step 7
Once the forearm is in position, align the forearm rails in the orentation you prefer then secure the front post sight.
Step 8
Tighten the forearm into place with a forearm wrench. Use a piece of cloth or rag to protect the forearm from scratches. Confirm that the forearm rail and the receiver rail are in align with each other. There is a small amount of adjustment in the forearm collar to aide in the alignment.
