The Reminton 51 was often said to be ahead of its time, and looking at the new R-51, it’s easy to see why. Both models use what Pedersen called “hesitation-locked” operation with a two-piece slide and locking block assembly. After firing the assembly slides back together for a short distance until the locking block engages with the frame, holding the cartridge just slightly out of battery while still providing a solid breech face. The barrel is fixed to the frame.
Sig Sauer P938 9mm subcompact with 6rd magazine. Single action only with ambidextrous safety, rubber grips, and factory night sights. - Beretta 96A1 Custom Grips http://www.rgrips.com/en/beretta-92-96-98-m9-grips/70-beretta-92-96-98-m9-grips.html