Double-sided AR-15 armorer block. This is the only block you will need for complete AR assembly work. Clamps into vice while securely holding an upper or turn it over and place it into a lower receiver. Includes hammer block for checking your trigger job. No more catching the hammer with your thumb! Also includes roll pin driver specially designed for AR assembly.
Features:
# Precision CNC machined from solid ultra high molecular weight polyethylene
# Virtually indestructible and resistant to all oils and solvents
# Hammer block snaps in to the main block when clamped into a lower receiver.

* Allows fine tuning of trigger pull without damaging receiver.
* Eliminates need to catch hammer when testing trigger pull.

# Roll pin driver CNC machined from solid stainless steel