Drop-In Or Oversized, 4340 Or Stainless
Installs in 1911 Autos with little to no fitting. Drop-In model fits snug in most slides, accepts standard barrels with no reaming. Oversize model has smaller I.D. that can be fitted to exactly match the barrel.
1911, Issue:11, Page:007
Big Book Catalog, Issue:68, Page:107
Sinclair, Issue:1A, Page:008
SPECS: .701" (17.8mm) O.D. 4340 CM or 416 Stainless steel.
Drop-In: .580" (14.7mm) I.D. Oversize: .575"