How many times have you tried to block your upper with rags and curses in a vice? Now that's enough! Here's the specific jig you were looking for.

The Delta Series® AR-15 Upper Vise Block is optimized for Mil Spec A2 uppers with Picatinny rails or grips , whether left or right handed.

Other AR-15 variants can be retrofitted with special attention to potentially non-compliant surfaces or features.

The Delta Series® AR-15 Upper Vise Block allows you to securely clamp your AR-15's upper receiver in a vise , holding it tightly without twisting, crushing or marring the finish.

This jig is the perfect product for tightening a barrel , removing a stubborn barrel nut, or for simple gun maintenance and cleaning.

It is made of a high-pressure, solvent-resistant polymer material that can withstand almost anything.

As an added bonus, it includes an upper insert with a gas tube alignment system , ensuring that the gas tube is always aligned when installing a barrel and tightening a barrel nut.

WHY BUY IT

• Fits right- and left-handed MIL-SPEC A2 carrying handles, as well as flat top receivers (other AR-15 variants can be retrofitted with special attention to potentially non-compliant surfaces or features).
• The gas tube alignment system fits into the rear of the receiver and helps prevent any receiver pinching.
• Made of high pressure and solvent resistant polymer material .
• Does not work with left-handed uppers that have a dust cover that opens upwards.