The Brownells AR-15/M16 Upper Receiver Action Block is a heavy-duty vise block that securely clamps AR-15/M16 receiver halves to help prevent crushing, twisting, or distortion during cleaning, assembly, repair, and barrel nut work. High-pressure, solvent-resistant Rynite surrounds and supports the upper receiver both inside and out so barrel removal/installation can be done safely and efficiently.
Key Features
Injection-molded Rynite construction helps resist solvents and withstand high vise pressure
Supports the upper receiver inside and out to reduce the risk of damage during barrel work
Torque tested to 200 ft lbs to help ensure barrel-nut removal/installation stays controlled
Designed to transfer torque from the barrel nut to the block and insert instead of the receiver
Fits A1, A2, and standard flattop upper receiver configurations for reliable clamping
Secure your AR upper firmly in the vise with this purpose-built action block from Brownells for safer, more consistent assembly and maintenance.
