The ROOK Tactical  PF940SC (G26/G27)  Front Locking Block Rail Upgrade for Polymer Pistols of the 80% Variety is a precision machined piece designed to overcome the weaknesses and tolerance issues associated with the standard Metal Injection Molded (MIM) parts. Proudly Manufactured in the USA utilizing a proprietary metallurgy Stainless Steel this is one upgrade you don't want to miss out on.
 
*This locking block will fit Polymer 80 PF940SC Frames ONLY!
 
** At this time we are unable to offer a discount code on these parts but we will be working diligently to reduce their price as the volumes increase.
 
**DOES NOT FIT GST-9 Model