SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 11-K

ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934-
For the fiscal year ended December 31, 2005

Commission file number 1-13905
-------

A. Full title of the plan and the address of the plan,  if  different  from
that of the issuer named below:

COMPX CONTRIBUTORY RETIREMENT PLAN
5430 LBJ Freeway, Suite 1700
Dallas, Texas 75240-2697

B. Name of  issuer  of the  securities  held  pursuant  to the plan and the
address of its principal executive office:

COMPX INTERNATIONAL INC.
5430 LBJ Freeway, Suite 1700
Dallas, Texas 75240-2697

SIGNATURE

Pursuant  to  the   requirements   of  the  Securities  Act  of  1934,  the
Administrator has duly caused this Annual Report to be signed by the undersigned
thereunto duly authorized.

COMPX CONTRIBUTORY RETIREMENT PLAN

By:  ADMINISTRATIVE COMMITTEE OF THE
COMPX CONTRIBUTORY RETIREMENT PLAN

By:  /s/ Raymond S. Staton               
------------------------------------
Raymond S. Staton
Committee Member

June 28, 2006

COMPX CONTRIBUTORY RETIREMENT PLAN

FINANCIAL STATEMENTS

December 31, 2005

with

REPORTS OF INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRMS

COMPX CONTRIBUTORY RETIREMENT PLAN

Index of Financial Statements

Page

Reports of Independent Registered Public Accounting Firms
Sutton Frost Cary LLP                                                  2
PricewaterhouseCoopers LLP                                             3

Financial Statements

Statements of Net Assets Available for Benefits -
December 31, 2004 and 2005                                          4

Statement of Changes in Net Assets Available for Benefits -
Year ended December 31, 2005                                        5

Notes to Financial Statements                                         6-9

Exhibit A
Consent of Independent Registered Public Accounting Firm -
Sutton Frost Cary LLP

Exhibit B
Consent of Independent Registered Public Accounting Firm -
PricewaterhouseCoopers LLP

- 1 -

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Participants and Administrative Committee of
CompX Contributory Retirement Plan:

In our opinion, the accompanying  statement of net assets available for benefits
and the  related  statement  of  changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of the CompX Contributory Retirement Plan (the "Plan") at December 31, 2005, and
the  changes in net assets  available  for  benefits  for the year then ended in
conformity with accounting principles generally accepted in the United States of
America.  These  financial  statements  are  the  responsibility  of the  Plan's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements  based on our audit.  We conducted  our audit of these  statements in
accordance with the standards of the Public Company  Accounting  Oversight Board
(United States).  Those standards  require that we plan and perform the audit to
obtain reasonable  assurance about whether the financial  statements are free of
material misstatement.  An audit includes consideration of internal control over
financial  reporting  as  a  basis  for  designing  audit  procedures  that  are
appropriate  in the  circumstances,  but not for the  purpose of  expressing  an
opinion on the  effectiveness  of the Plan's  internal  control  over  financial
reporting.  Accordingly,  we express  no such  opinion.  An audit also  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the  financial   statements,   assessing  the  accounting  principles  used  and
significant  estimates made by management,  and evaluating the overall financial
statement  presentation.  We believe that our audit provides a reasonable  basis
for our opinion.

As further  described in Note 2,  effective  December 31, 2005,  the Plan merged
into The Employee 401(k) Retirement Plan.

Sutton Frost Cary LLP
A Limited Liability Partnership
Certified Public Accountants

June 2, 2006
Arlington, Texas

- 2 -

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the  Participants  and  Administrative  Committee  of the CompX  Contributory
Retirement Plan:

In our opinion,  the  accompanying  statement of net assets  available  for
benefits presents fairly, in all material respects, the net assets available for
benefits of the CompX Contributory  Retirement Plan (the "Plan") at December 31,
2004 in conformity with accounting  principles  generally accepted in the United
States of America.  This financial statement is the responsibility of the Plan's
management.  Our  responsibility  is to express  an  opinion  on this  financial
statement  based on our  audit.  We  conducted  our audit of this  statement  in
accordance with the standards of the Public Company  Accounting  Oversight Board
(United States).  Those standards  require that we plan and perform the audit to
obtain  reasonable  assurance  about whether the financial  statement is free of
material  misstatement.  An audit includes examining,  on a test basis, evidence
supporting the amounts and disclosures in the financial statement, assessing the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audit provides a reasonable basis for our opinion.

PricewaterhouseCoopers LLP
Dallas, Texas
June 28, 2005

- 3 -

COMPX CONTRIBUTORY RETIREMENT PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS

December 31, 2004 and 2005

2004                   2005
----                   ----

Assets:

Investments at fair value                                                        $16,568,572         $     -    

Loans to participants                                                                777,015               -
-----------         -----------

17,345,587               -

Contributions receivable:
Employer                                                                           587,501               -

Participants                                                                         4,084               -
-----------         -----------

Net assets available for benefits                                            $17,937,172         $     -
===========         ===========

See accompanying notes to financial statements.
- 4 -

COMPX CONTRIBUTORY RETIREMENT PLAN

STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

Year ended December 31, 2005

Additions:
Investment income:

Net appreciation in fair value of investments                                                 $    393,140
Dividends                                                                                          608,717
Interest                                                                                            61,890
------------
1,063,747
Contributions:
Employer                                                                                           647,643
Participants                                                                                     1,314,457
------------

1,962,100

Total additions                                                                                3,025,847
------------

Deductions:
Benefits to participants                                                                           4,168,878
Administrative expenses                                                                                1,971
------------

Total deductions                                                                               4,170,849
------------

Net decrease in net assets available for benefits
prior to merger                                                                                    (1,145,002)

Merger to The Employee 401(k) Retirement Plan                                                      (16,792,170)
------------ 

Decrease in net assets available for benefits                                                      (17,937,172)

Net assets available for benefits:
Beginning of year                                                                                 17,937,172
------------

End of year                                                                                     $      -
============

See accompanying notes to financial statements.
- 5 -

COMPX CONTRIBUTORY RETIREMENT PLAN

NOTES TO FINANCIAL STATEMENTS

Note 1 -  Description of Plan and significant accounting policies:

General.  The following  description of the CompX  Contributory  Retirement
Plan (the "Plan") provides only general  information.  Participants should refer
to the Plan agreement for a more complete  description of the Plan's provisions.
The Plan was merged into The  Employee  401(k)  Retirement  Plan on December 31,
2005. See Note 2.

The  Plan  is a  defined  contribution  plan  which  covers  eligible  U.S.
employees of CompX International Inc. and its U.S.  subsidiaries  (collectively,
the  "Employer").  Employees are eligible to  participate  in the Plan as of the
first entry date, as defined,  concurrent  with or next following the completion
of 90 days of  eligible  service  and  attaining  20 years  of age.  The Plan is
subject to the  provisions  of the Employee  Retirement  Income  Security Act of
1974, as amended ("ERISA").

The Employer is 83% owned by CompX Group, a majority-owned subsidiary of NL
Industries,  Inc. at December 31, 2005. NL owns 82% of CompX Group, and Titanium
Metals Corporation  ("TIMET") owns the remaining 18% of CompX Group. At December
31, 2005 (i) NL and TIMET own an  additional 2% and 3%,  respectively,  of CompX
directly,   (ii)  Valhi,   Inc.   holds,   directly  or  through  a  subsidiary,
approximately  83% of NL's  outstanding  common stock and  approximately  39% of
TIMET's outstanding common stock and (iii) Contran  Corporation holds,  directly
or through subsidiaries,  approximately 92% of Valhi's outstanding common stock.
Substantially  all of  Contran's  outstanding  voting  stock  is held by  trusts
established for the benefit of certain  children and  grandchildren of Harold C.
Simmons,  of which Mr.  Simmons is sole  trustee,  or is held by Mr.  Simmons or
persons or other entities related to Mr. Simmons.  Consequently, Mr. Simmons may
be deemed to control each of such companies and the Plan.

Contributions.  The Plan permits  participants  to defer 1% to 100% (highly
compensated  employees  are  limited  to a  maximum  of  25%)  of  their  annual
compensation  as pre-tax  contributions,  not to exceed a deferral of $14,000 in
2005  (subject to  adjustment  in future  years),  through  payroll  deductions.
Participants  who will be at least  age 50 by the end of the Plan year may elect
to make "catch-up" contributions, not to exceed an additional deferral of $4,000
in 2005 (subject to  adjustments in future years)  through  payroll  deductions.
Pursuant to the Internal Revenue Code, total participant  contributions (pre-tax
and after-tax) and employer contributions are limited to an aggregate of $42,000
from  all  employer   defined   contribution   plans  in  2005.  The  Employer's
contribution is based upon a profit-sharing  formula and the Employer's  profit,
as defined,  during the Plan year. The Employer's  contribution  is allocated to
participants'  accounts  on a  percentage  or  matching  basis  relative  to the
participants' contributions (excluding catch-up contributions) for the year. The
Employer's  contribution  is  reduced,  as provided  by the Plan,  by  nonvested
amounts  forfeited by  participants  who withdraw from the Plan. At December 31,
2004 and 2005,  unallocated  forfeited  nonvested accounts were $103,175 and nil
respectively. Forfeitures of $116,855 were used to reduce employer contributions
for the year ended December 31, 2005.

Vesting and benefits.  Salary deferrals  (including  earnings  thereon) are
immediately  vested while Employer  contributions  (including  earnings thereon)
vest at the rate of 20% per year of service, as defined.

Upon  termination  of employment,  retirement or death,  a participant  (or
beneficiary,  if  applicable)  may elect to receive either (i) a lump sum amount
equal to the vested  value of the  participant's  accounts or (ii)  installments

- 6 -

over a period of not more than 30 years. Distribution of a participant's account
balance  in a lump sum  without  the  participant's  consent  may be made if the
vested  portion of the  participant's  account  is not  greater  than  $5,000 or
distribution  commences after the participant attains 65 years. With the consent
of the Plan  administrators,  participants  can borrow amounts from their vested
account balances, subject to certain limitations under the Plan.

Benefits are recorded when paid.

Participants'  accounts.  Participants can direct the Plan administrator to
invest, in 1% increments,  their account balance in  publicly-traded  registered
investment  companies or commingled trusts administered by Putnam Investments or
in  CompX  International  Inc.  common  stock  (not  to  exceed  25% of  account
balances).  On September 23, 2005, participants were notified that they would no
longer  be able to  invest  in CompX  stock  effective  December  30,  2005.  In
addition,  no new  contributions or account transfers could be made to the CompX
Stock Fund after  September 30, 2005; and if the  participant had not liquidated
the balance of his CompX  Stock Fund by December  12,  2005,  the Company  would
begin to liquidate it and transfer the proceeds to the Putnam S&P Index Fund.

Each participant's account is credited with the participant's  contribution
and an allocation of the Employer's  contribution and Plan earnings, and charged
with  an  allocation  of  administrative  expenses.  Allocations  are  based  on
participant earnings, matching or account balances, as defined in the Plan.

In addition to the investment fund options,  a "Loan Fund" is maintained to
account for loans to  participants,  as permitted by the Plan. A participant  is
able to borrow from  his/her  fund  account an amount  ranging from a minimum of
$1,000 up to a maximum that is  generally  equal to the lesser of $50,000 or 50%
of his/her vested account balance.  A loan is  collateralized  by the balance in
the  participant's  account and bears interest at rates  commensurate with local
prevailing  rates. For outstanding  loans at December 31, 2005 prior to transfer
to the Retirement Plan, interest rates ranged from 5.0% to 10.5%.

Plan termination.  The Employer has the right under the Plan to discontinue
its  contributions at any time and to terminate the Plan, in compliance with the
provisions of ERISA.  In the event the Plan is  terminated,  the accounts of all
participants will become fully vested.  The merger of the Plan into The Employee
401(k) Retirement Plan (see Note 2) was not a termination of the Plan.

Basis of accounting.  The financial  statements of the Plan are prepared in
accordance with accounting principles generally accepted in the United States of
America. Valuation of investments is more fully described in Note 3.

Management estimates. The preparation of financial statements in conformity
with accounting  principles  generally  accepted in the United States of America
requires  management to make estimates and assumptions  that affect the reported
amounts  of  assets,  liabilities,   and  changes  therein,  and  disclosure  of
contingent assets and liabilities. Actual results may, in some instances, differ
from previously estimated amounts.

Risks and  uncertainties.  The Plan provides for various investment options
in a variety of stocks, bonds, fixed income securities,  mutual funds, and other
investment securities.  Investment securities are exposed to various risks, such
as interest rate,  market, and credit risks. Due to the level of risk associated
with certain  investment  securities,  it is at least  reasonably  possible that
changes in the values of investment  securities  will occur in the near term and
that such changes could materially affect participants' account balances and the
amounts reported in the Plan's statement of net assets available for benefits.

- 7 -

Expenses of  administering  the Plan.  The Plan  provides that the Employer
will generally reimburse the Plan for administrative  expenses paid by the Plan.
The Employer paid a significant portion of the 2005 administrative expenses.

Tax status. The Plan has been notified by the Internal Revenue Service in a
letter dated  December 13, 2004 that it is a qualified plan under Section 401(a)
and Section 401(k) of the Internal  Revenue Code (the "Code"),  and is therefore
exempt from federal income taxes under provisions of Section 501(a) of the Code.

The Plan has been amended since it was notified of its exempt status by the
Internal  Revenue  Service.  Management  believes  that  the Plan  currently  is
designed and operates in accordance with the applicable requirements of the Code
and  therefore  remains  exempt from federal  income taxes under  provisions  of
Section 501(a) of the Code.

Note 2 - Plan Merger:

On  December  31,  2005,  the Plan was  merged  into  The  Employee  401(k)
Retirement Plan  ("Retirement  Plan") resulting in the transfer of net assets of
$16,792,170  into  the  Retirement  Plan.  Participants  of the  Plan  began  to
participate in the Retirement Plan on January 1, 2006.

The merger initiated a "Black Out" period  beginning  December 27, 2005 and
continuing  through January 15, 2006.  During this period,  changes could not be
made to  participant  accounts and funds could not be withdrawn  from either the
Plan or the Retirement Plan.

Note 3 - Investments:

General.  Prior to December 31, 2005,  the assets of the Plan were held and
the related  investment  transactions  were executed by Putnam  Fiduciary  Trust
Company as trustee (the  "Trustee")  of the CompX Master  401(k) Plan Trust (the
"Trust"). The Trust invested in publicly-traded registered investment companies,
commingled  trusts  administered by Putnam  Investments and CompX  International
Inc.  class A common  stock (see Note 1).  The Plan  assets  invested  in Putnam
mutual funds and commingled  trusts qualify as  party-in-interest  transactions.
The Plan's  investments  are stated at fair value based on quoted  market prices
and net  appreciation  for the year is  reflected  in the  Plan's  statement  of
changes in net assets available for plan benefits. The net appreciation consists
of realized  gains or losses and  unrealized  appreciation  or  depreciation  on
investments.  Purchases  and sales of  securities  are  recorded on a trade-date
basis. Dividends are recorded on the ex-dividend date.

The following presents  investments that represent 5 percent or more of the
Plan's net assets at year end:

December 31,
2004                          2005
----                          ----

Putnam Stable Value Fund (commingled trust)                                       $4,201,986                    $ - 

Putnam Voyager Fund (class Y shares)                                               2,287,495                      - 

Calamos Growth Fund (class A shares)                                               2,017,371                      - 

PIMCO Total Return Fund (class A shares)                                           1,282,783                      - 

Putnam S&P 500 Index Fund (commingled trust)                                       1,241,106                      - 

UAM ICM Small Company Portfolio Fund
(Institutional shares)                                                            1,154,597                      - 

Managers Special Equity Fund                                                       1,046,159                      - 

- 8 -

During  2005,  the  Plan's  investments  (including  gains  and  losses  on
investments  bought and sold,  as well as held during the year)  appreciated  in
value by $393,140 as follows:

Mutual funds                                           $  343,078
Commingled trusts                                          57,163
Common stock                                               (7,101)
---------- 
$  393,140

EXHIBIT A

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby  consent to the  incorporation  by reference in the  Registration
Statement on Form S-8 (No.  333-56163) of CompX International Inc. of our report
dated June 2, 2006  relating to the financial  statements of CompX  Contributory
Retirement Plan, which appears in this Form 11-K.

Sutton Frost Cary LLP
Arlington, Texas
June 28, 2006

EXHIBIT B

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statement on Form S-8 (No.  333-56163) of CompX International Inc. of our report
dated June 28, 2005 relating to the financial  statements of CompX  Contributory
Retirement Plan, which appears in this Form 11-K.

PricewaterhouseCoopers LLP
Dallas, Texas
June 28, 2006