Got a handful of these in a group buy and I wound up with a few extra.
If you want one, they are $39.95 with free Priority shipping.
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The Block-Worx two piece holding fixture for the AR-15 family of flat-top upper receivers offers superior protection for your AR-15 upper receiver while performing a number of maintenance and assembly functions. This set can be used with left or right hand uppers, 9MM or rim-fire uppers, most any variant of the AR-15 family of flat-top upper receivers will work with this set of action blocks and it will accommodate most hand guard configurations without modification to the fixture. The two piece holding fixture provides the proper clamping position for barrel installation with no danger of warping or bending the upper receiver even at the upper end of the torque range. The bottom portion of the set can be used by itself for a number of operations such as scope installation, cleaning, bolt work, hand guard installation… ECT. Basically any operation that does not require a great amount of torque can be preformed by using either the top portion or bottom portion by themselves. And unlike other action blocks the Block-Works holding fixture set does not require removal of the bolt and charging handle in order to clamp the receiver and because of this the Block-Works fixture also allows full access to the interior of the receiver for convenient cleaning of the receiver, barrel extension and bore from the breech rather than from the muzzle. The Block-Worx holding fixture set is made from non-marring high density polymer and will provide years of service for less cost than most single piece action blocks.
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