S&W Revolver Frame Sizes

[Hawg Rider]

There was a Forum post a week or so ago that discussed thoughts on how S&W arrived at their nomenclature for the various sizes of S&W revolver frames. For those of you who do not subscribe to Guns or American Handgunner magazine, here is an interesting article on the various frame sizes.

American Handgunner J, K, L, N, M? E-I-E-I-O… Demystifying All Those S&W Frame Types - American Handgunner

[JudgeColt]

Typical gun magazine fluff. The article contains quite a few minor errors, like the reference to the ".44 Magnum L-frame." I did not see any explanation as to how the actual letter frame designations were selected, just a cursory discussion of the history and use of the various frame sizes.

[Hondo44]

That's a pretty good article about the lettered frame sizes and obviously wasn't intended as a comprehensive list, but limited to the blued steel version Hand Ejector swing out cyl models that were also offered in other materials, and the X and Z models

1. However, a little more research will reveal that the letter frame sizes (which originated in the S&W tool room) for current stainless steel versions of those blue models are different.
Stainless frame letter sizes in the SCSW 4th ed. page 21 at the top of the right hand column:

J = E
K =F
L =H
N =G


2. Also letter sizes are actually more complicated for the modern DA revolvers:

S&W Model # Listing with frame letter designations To 1979 (including non-revolvers designated Auto):

Model#, year(s), Frame letter(s), Caliber, and Name

10 1899 K 38 Spl Military & Police
10 HB 1960 K 38 Spl Military & Police Heavy Barrel
11 1936 1965 K 38 S&W Military & Police
12 1953 1986 KA 38 Spl Military & Police Airweight
13 1974 K 357 Mag 357 Magnum M&P
14 1947 1982 KT 38 Spl K-38 Masterpiece
15 1949 KT 38 Spl K-38 Combat Masterpiece
16 1947 1973 KT 32 S&W Long K-32 Masterpiece
17 1946 KT 22 LR K-22 Masterpiece
18 1949 1986 KT 22 LR K-22 Combat Masterpiece
19 1955 KT 357 Mag 357 Combat Magnum
20 1930 1966 N 38 Spl 38/44 Heavy Duty
21 1908 1966 N 44 Spl 1950 Model 44 Military
22 1917 1966 N 45 ACP 1950 Model 45 Army
23 1931 1966 NT 38 Spl 38/44 Outdoorsman
24 1908 1966 NT 44 Spl 1950 Model 44 Target
24 1984 1984 NT 44 Spl 7500 units reintroduced
25 1955 1983 NT 45 ACP 1955 Model 45 Target
25-3 1977 1977 NT 45 Colt 125th Commemorative
25-4 1977 1977 NT 45 Colt 125th Delux Comm
25-5 1978 NT 45 Colt 45 Colt
26 1950 1966 NT 45 ACP 1950 45 Target Light Barrel
27 1935 NT 357 Mag 357 Magnum
28 1954 1986 NT 357 Mag 357 Highway Patrolman
29 1955 NT 44 Mag 44 Magnum
30 1896 1976 I&J 32 S&W Long 32 Hand Ejector
31 1917 I&J 32 S&W Long 32 Regulation Police
32 1936 1974 I&J 38 S&W 38 Terrier
33 1917 1974 I&J 38 S&W 38 Regulation Police
34 1936 I&J 22 LR 22/32 Kit Gun 4" barrel
35 1911 1973 I&J 22 LR 22/32 Target 6" Barrel
36 1950 J 38 Spl 38 Chief Special
37 1952 JA 38 Spl 38 Chief Special Airweight
38 1955 JAC 38 Spl Bodyguard
39 1954 1981 Auto 9mm 9mm Double Action
both alloy and steel
39-1 1960 1960 Auto 38 AMU Commonly called M-52A
alloy
40 1952 1974 JS 38 Spl Centennial
41 1952 Auto 22 LR 22 Semi-Automatic
41-1 1960 1972 Auto 22 short 22 Short Semi-Auto
42 1953 1974 JAT 38 Spl Centennial Airweight
43 1954 1974 JAT 22 LR 22/32 Kit Gun Airweight
44 1954 1959 Auto 9mm 9mm Semi, Single Action
alloy
45 1936 1965 K 22 LR 22 Military & Police
46 1959 1968 Auto 22 LR 22 Semi Auto
47 Experimental number used on several guns
48 1959 1986 KTM 22 WMRF K-22 Masterpiece MRF
49 1959 JC 38 Spl Bodyguard Steel Frame
50 1955 1975 JT 38 Spl 38 Chief Special Target
51 1960 1974 JTM 22 WMRF 22/32 MRF Kit Gun
52 1961 Auto 38 Spl 38 Chief Special Target
Steel
52-A See Model 39-1
53 1961 1974 KTC 22 Jet 22 center fire magnum
54 Experimental never issued
55 Experimental never issued
56 1962 1963 KT 38 Spl KTX 38 Became Mod 15 2" bl.
57 1964 NT 41 Mag 41 Magnum
58 1964 1978 N 41 Mag 41 Magnum Military& Police
59 1971 1981 Auto 9mm 14 shot 9mm Semi-Auto
Alloy
60 1965 J 38 Spl 38 Chief Special Stainless
61 1970 1973 Auto 22 LR 22 Escort
62 Experimental never issued
63 1977 JT 22 LR 1977 22/32 Kit Gun Stainless
64 1970 K 38 Spl 38 Military & Police Stainless
65 1974 K 357 Mag 357 Mag M&P Stainless
66 1971 KT 357 Mag 357 Combat Mag Stainless
67 1972 KT 38 Spl 38 Combat Masterpiece Stainless
68 1976 1976 KT 38 Spl California Highway Patrol



3. And letter frame sizes apply to more than "the birth of the modern DA revolver", the Hand Ejectors (Notice some letter sizes are duplicated):


32 Double Action R
32 Safety Hammerless G
38 Single Action S
38 Double Action D
38 Safety Hammerless Y
44 Double Action L
22 Hand Ejector M
32 Hand ejector I
38 Military and Police K
44 Hand Ejector N
38 Double Action Perfected P
22 Perfected Single Shot T
35 Automatic A
32 Regulation Police B
38 Regulation Police E
22/32 Heavy Frame Target V

[delcrossv]

M,I,J,K,L,N,X