The SierraPapa hammer upgrade is manufactured in the USA from a solid block of high grade stainless steel. After machining the hammer is polished and hardened for long life and smooth operation, and finally the sear notch is hand-polished in our own shop to provide the smoothest possible trigger release.

The hammer is engraved "SP USA" to demonstrate BATFE Part 922R compliance.

For best overall results the hammer upgrade should be installed concurrently with our adjustable metal trigger and reduced power hammer spring upgrades.

Price of hammer/trigger/spring upgrade kit: $186.50*

Shipping charge $10.50* by USPS Priority Mail

*A credit card processing fee of 3% applies to all credit card transactions. Payment by check, money order, or cash allows us to waive processing fees and keep our prices lower.

Be sure to view our warranty and terms of sale.