Mil-Comm Products Company, Inc.
2 Carlton Ave, E. Rutherford, NJ 07073
(201) 935-8561 FAX: (201) 935-6059
Suggested Lubrication Practices
for TW-25B Lubricant/Protectant on the
M16 Rifle (5.56mm)
TW25B is the preferred lubricant. TW25B is a light, semi-fluid grease that provides both lubrication
and protection against corrosion. TW25B is available in a variety of packages to make application
easier: bulk jar, grease gun cartridge, syringe (for precision placement), tube, and spray (“EP”). A
companion product, MC2500, is a light, pourable/pumpable oil. Product descriptions and NSNs are
listed on the last page.
Note
Before applying TW25B, the surface must be thoroughly cleaned: all old oil and grease should
be removed, the surface should be cleaned and free of oil residues, and the surface should be
dry. The EP spray can be used as needed on unpainted surfaces to quickly achieve effective
corrosion protection.
SURFACE PREPARATION
The suggested method of preparation is:
- Clean with approved cleaning product
- Flush off all residue with isopropyl alcohol
APPLICATION
Conditions for applying TW25B
Visibility After
Conditions Thickness Application Applicators
1 - very close tolerances very light white grease is brush, cloth, patch,
- sand or dust environments not visible spray
2 - heavy load bearing light to white grease is brush, cloth, syringe,
- salt/fresh water corrosion moderate slightly visible spray
- heat or high speed
- long-term storage
3 - bearings, gears, grease heavy white grease is brush, caulk or grease
fittings plentiful gun, bearing packer
- extended extreme load
- marine exposure
General
1. After cleaning each part, spray with EP to Condition 1 for immediate corrosion protection.
2. Apply additional TW25B to Condition 2 as needed on parts in contact, or that slide or mesh.
3. Apply additional TW25B to Condition 3 as needed on parts where heavy load and/or pressure is
experienced.
4. Where sand and/or dust accumulations would impede functionality, wipe off excess with a cloth.
(The cloth can be used to apply a light coat to exterior surfaces of other parts.)
REV: 12 FEB 2003 AI2-M16.DOC Page 1 of 3
COPYRIGHT 1985-2003 Mil-Comm Products Company, Inc.
Clear the Rifle
ALWAYS clear the rifle before working on it!
a. Point rifle in safe direction!
b. Place selector lever on SAFE. If weapon is not cocked, cannot be pointed toward SAFE.
c. Remove the magazine.
d. Lock the bolt open:
- Pull charging handle rearward and press bottom of bolt catch.
- Allow bolt to move forward until it engages the bolt catch.
- Return charging handle to forward.
- If you haven’t before, now place selector lever on SAFE.
e. Check receiver and chamber to ensure these areas contain no ammo!
f. With selector lever pointing toward SAFE, allow bolt to go forward by pressing upper portion
of bolt catch.
Preparation
1. Disassemble the rifle as indicated by the applicable Technical Manuals. At this point:
a. Sling is removed.
b. Handguards are removed.
c. Upper and lower receivers are open and apart.
d. Bolt carrier (with bolt) is removed.
e. Charging handle is removed.
f. Firing pin retaining pin is removed.
g. Firing pin is removed from carrier.
h. Bolt cam pin is removed from carrier.
i. Bolt is removed from carrier.
2. If rifle is dirty or damaged:
j. Extractor pin is removed.
k. Extractor and spring are removed. (If damaged, replace spring.)
l. Buffer assembly is removed and action spring separated from buffer body.
3. Clean bore and all parts thoroughly!
4. After cleaning a part, immediately rinse in ISA and apply a very light coat (Condition 1) of
TW25B. Alternatively, use the EP spray to apply very light coat.
BE SURE to spray into carrier key (to Condition 1).
Specific Parts and Assemblies
1. Apply moderate coat (Condition 2) of TW25B to:
a. Inner and outer surfaces of upper receiver.
b. Bore (only!) DO NOT lubricate the chamber!!
c. Charging handle.
d. Inner and outer surfaces of bolt carrier.
e. Inside areas of lower receiver.
f. All surfaces of buffer and buffer action spring.
g. Outer surfaces of barrel and front sight.
h. Surfaces under handguards.
i. Adjustable rear sight.
2. Depress front sight detent. Using the EP, spray a moderate coat (Condition 2) onto the spring.
Depress detent several times to work TW25B into spring.
3. Use a small brush to lubricate the locking lugs to Condition 3. Wipe off excess with a clean rag.
4. Lubricate the ejector (in extractor portion of bolt) to Condition 2 using the EP spray. Wipe away
any excess. Work TW25B into the ejector by gently rocking a spent cartridge in the extractor.
5. Apply moderate coat (Condition 2) TW25B to firing pin, firing pin recess in bolt, & extractor pin.
6. Apply TW25B to Condition 3 on all outside surfaces of bolt. Make certain to lubricate cam pin
area and bolt rings on the bolt.
7. Apply TW25B to Condition 3 to bolt cam pin, firing pin retaining pin, to the slide and cam pin
areas of bolt carrier, to the takedown and pivot pins and their detents, and to all moving parts
inside the lower receiver, as well as their pins.
REV: 12 FEB 2003 AI2-M16.DOC Page 2 of 3
COPYRIGHT 1985-2003 Mil-Comm Products Company, Inc.
REFERENCED PRODUCTS
The above instructions make reference to the following product packages:
Mil-Comm Part Number National Stock Number (NSN)
TW25B Grease Packages
1.5 oz. Tube TW25B-1SP11 9150-01-439-0859
4.0 oz. Tube TW25B-4SP14 9150-01-439-1873
8 oz. Can TW25B-1JSL16 9150-01-439-0858
16.9 fl. oz. (500 ml) EP Spray TW25B-CA16EP 9150-01-448-2298
0.5 oz. Syringe TW25B-1SY12 9150-01-448-2266
16 wt. oz. Cartridge, Zerk TW25B-6NZ17 9150-01-439-0857
16 wt. oz. Cartridge, Caulk TW25B-1NC17 9150-01-439-1864
MC2500 Oil Packages
16 fl. oz. Bottle, oil MC2500-16AP4 9150-01-439-1875
128 fl. oz. (1 Gal) Can, oil MC2500-45AP5 9150-01-439-1887
Mil-Comm offers other packaging; contact your local representative or the Defense Logistics Agency.
Product Descriptions
TW25B Lubricant/Protectant and MC2500 are non-toxic, non-flammable, non-corrosive, harmless to
wood, plastic, rubber, and composites. EP spray contains flammable isopropyl alcohol.
TW-25B LIGHT GREASE
TW25B-1SY12 SYRINGE 0.5 weight-ounce plastic syringe (14 grams). Designed for
convenient application into small, recessed or otherwise hard to
reach lubrication points, featuring a one inch, tapered plastic
dispensing tip and a flow turn-off valve.
TW25B-1SP11 TUBE 1.5 weight-ounce plastic tube (43 grams) featuring a dispenser tip
with a screw-on closure. Designed for individual, tool, or weapons
maintenance kit.
TW25B-4SP14 TUBE 4 weight-ounce plastic tube (113 grams) having a dispenser tip with
a screw-on closure. Designed for large tool or weapons
maintenance kit.
TW25B-1JSL16 JAR 8 weight-ounce (227 grams) plastic jar featuring screw-on lid.
Designed for shop or bench use.
TW25B-1NC17 CARTRIDGE 16 weight-ounce (454 grams) plastic caulk cartridge for larger
lubrication points WITHOUT grease fittings.
TW25B-6NZ17 CARTRIDGE 16 weight-ounce (454 grams) cardboard ZERK cartridge for
lubrication points WITH grease fittings.
TW25B-CA16EP COMPRESSED-AIR 16.9 fluid-ounce (500 ml) non-aerosol pressurized aluminum EP
PRESSURIZED SPRAY spray can designed for convenient spray application into recessed
CAN (“EP”) or hard to reach points, and for quick application of initial corrosion
(NON-AEROSOL) protection layer. Features an angular extended nozzle with finger
pushbutton actuator.
The EP spray contains isopropyl alcohol, which helps to loosen and
flush residues and distribute the TW25B.
MC-2500 OIL
MC2500-16AP4 BOTTLE 16 fluid-ounce aluminum bottle (472 ml) with dispenser cap.
MC2500-45AP5 CAN 1 Gallon metal UN can (3.785 liters) with pour spout.
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COPYRIGHT 1985-2003 Mil-Comm Products Company, Inc.
