This Adjustable V-Block is used to secure the barrel to the receiver for 10/22 and similar firearms using two cap screws which are sold separately.   It has a set screw which can be adjusted in contact with the barrel to prevent barrel droop which is common when the cap screws are tightened to draw the barrel into the receiver.  Using this Adjustable V-Block will allow you to set your barrel line to your optics line at any position your desire.  The Adjustable V-Blocks are available in your choice of blue steel or stainless steel and ship complete with the adjusting allen wrench. 

For custom builds, this Adjustable V-Block is a necessity.

INSTALLATION INSTRUCTIONS

Installation is fast and easy and will allow you to compensate for any barrel droop to ensure that your barrel is on the same line as your receiver rail.  If your barrel droops when the V-Block is tightened, its possible for the barrel to be so low that the scope does not have sufficient range to compensate. 

1.  Place the barrel in the receiver hole. 

2.  Place the Adjustable V-Block in the barrel cut-out with the setscrew orientated so that the setscrew can be adjusted while the V-Block is on the gun.  

3.  Install both cap screws through the V-Block into the receiver and tighten until they just have MINIMAL torque resistance.  DO NOT TIGHTEN THEM.

4.  Stand the receiver up on the rear of the reeiver with the barrel pointing toward the ceiling.  Ensure that the extractor cut is correctly orientated to the extractor on the bolt. 

5.  With the receiver and barrel pointing toward the ceiling, push the barrel tightly against the receiver.  This is the position that you want the V-Block to hold the barrel when the cap screws are tightened.  While holding the barrel against the receiver, turn the setscrew in the Adjustable V-Block until it is pushing on the barrel and begins to minimally push the barrel upwards.  Back the screw off until there is no upwards push on the barrel but the setscrew is still in contact with the barrel.

6.  Tighten each capscrew to snug the barrel to the receiver.  Do not over torque the screws.  Overtorquing the cap screws can strip the aluminum threads in the receiver and will render the receiver not usable.

Verify that the extractor on the bolt is lined up with the barrel and installation is complete.