M.G.L. c. 140, § 131K requires that any firearm or large capacity weapon sold within the Commonwealth must be sold with a safety device designed to prevent the discharge of such weapon by unauthorized users. The following safety/locking devices have been approved by the Colonel of the Department of State Police as complying with the provisions of M.G.L. c. 140, § 131K:

1

CCL Sesamee Gun Blok combination lock

2

Master Lock: cable key lock or trigger guard lock

3

Outer/Cease Fire trigger lock

4

Shot Lock Corp. keyed cable lock or trigger guard lock

5

Speed Release gun lock

6

Dominion group trigger lock

7

Remington trigger lock

8

Mossberg cable lock

9

American Firearms Council cable lock

10

Rocky Mountain Tool and Armory chamber-safe

11

Saf T Lock's magazine lock

12

Franzen trigger combination lock

13

Noble guard wall mount gun lock

14

Noble trigger lock

15

Noble double security cable gun lock

16

Central Specialties Trigger Lock Model 9311

17

Crown Trigger Lock

18

Miltex Inc. Trigger Lock

19

Concept Development Corp. / Law Lock key cuff trigger lock

20

Concept Development Corp. / Trigger block safety in conjunction with the Saf-T-Block combination lock

21

A. Rifkin Company Arcolock-7 keyed lock model

22

Armloc Magnum (handgun safety system) combination lock container

23

Franzen model 6.0 combination cable lock

24

Franzen keyed trigger lock

25

Concept Development Corp. Law Lok III, key cuff trigger lock

26

Bell Trigger Lock model B100KA

27

Bellock model #B300-8ka cable key lock

28

Bellock economy trigger lock model #B200-3

29

CCL Security Products model K-39 Trigger Blok (keyed)

30

CCL Security Products model CA12 Sesamee Cablelock (combination)

31

Palmer Security Products model/ series 5000, 5500, 6000, 7000, 8100, 9000, push button lock/ key systems

32

Steyer M-Series Integrated Limited Access Lock with Key

33

Armadillo Gun Trigger lock (keyed)

34

Master Lock: combination gunlock

35

Taurus International - hammer key lock

36

Mossberg Safe Systems Inc. Portable Electronic firearm safe

37

Life jacket by Mogul Company

38

Saf-T-Trigger

39

DAC Technologies Items: MTL, LHL, TVP, GL001, CL200, CL100

40

UNEX Keyed trigger lock and keyed cable lock

41

Alarm It w/cable lock

42

Smart Trigger lock with alarm

43

Maximum security cable lock

44

Regal keyed cable lock model SL14-4PTACA

45

Project HomeSafe Cable Lock

46

Omega Safety Systems Internal Chamber Lock

47

Project Child Safe Cable Lock w/Key

48

Regal keyed cable lock model DCSC-5-DTACA14

49

VisualLock (special Keyed lock)

50

CABLE LOCK (NAD Corporation, Worcester, MA)

51

CHILD GUARD (Child Guard LLC, Lancaster, PA)

(List Revised 3-15-2007)
This list will be supplemented periodically

In addition to the approved list, pursuant to the provisions of M.G.L. c. 140, the Colonel of the Department of State Police has determined that locks provided by the manufacturer of firearms, or large capacity weapons, both as defined in Section 121 of Chapter 140, sold within the Commonwealth, that are designed to prevent the discharge of such weapon by unauthorized users shall be deemed as approved locks for the purpose of complying with the provisions of M.G.L. c.140, § 131K.