Drop-in, Delrin block helps you gain a true feeling of trigger
movement and pull weight without sacrificing your thumb. Go
ahead, drop the hammer; this shock-absorbing block prevents the
hammer from striking the wall of the magazine well. Helps
eliminate expensive receiver damage and broken hammers. Fits
into the magazine well with the upper receiver open or removed,
withstands thousands of hammer strikes.
SPECS: Delrin, black. 2-1/8" (5.4cm) high, 3" (7.6cm) long.
Catalog page 76