SF means "Short Frame". This is somewhat of a misnomer, because the frame is the same HEIGHT and WIDTH but the DEPTH (backstrap to front strap) is reduced.
The SF frame is SLIGHTLY "shorter" (based upon Glock's description above) than the Gen 4 without an added backstrap. Some people claim they're the same, but the caliper states otherwise.
JYD #123 The great one formerly known as Architect.
I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.
