USMC Ontario Knife Company 3S Bayonet

(1 customer review)

This product is currently out of stock and unavailable.


  • Includes Knife Sheath
  • Partially Serrated Knife Edge
  • MOLLE Compatible
  • 1 MOLLE Strap

Issue Type: USMC Issue

Manufactured by:

  • Various Government Contractors

Country of Manufacture: USA

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SKU: 1W3 Category:
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This is a bayonet and fighting knife that is used in the US Marine Corps. The bayonet fits USGI and Mil-Spec M16/M4’s and is attached over the barrel and secured to the bayonet lug. The knife is partially serrated and has a bowie knife style contour. The grip is rubberized for a secure hold when wet or wearing gloves. On the back of the sheath is a knife sharpener for field sharpening and maintenance. The sheath can be mounted to MOLLE surfaces and includes to button snap straps to secure the bayonet. This is an awesome field knife for general purpose use and for completing any Mil-Spec AR.

Used Condition: Blades are in good overall condition with minor nicks/burrs. May need resharpening from use. Scabbards WILL HAVE writing on them form previous use and issue.

BLADE FINISH: Zinc Phosphate
BLADE GRIND: Flat Bevel w/ Secondary Flat Bevel
BLADE LENGTH: 8 in (20.3 cm)
OVERALL LENGTH: 13.3 in (33.7 cm)
BLADE MATERIAL: 1095 Carbon Steel
BLADE THICKNESS: 0.200 in (0.508 cm)


  • Includes Knife Sheath – Include sheath for knife for storage and carry.
  • Partially Serrated Knife Edge – Edge of knife is serrated along part of the edge.
  • MOLLE Compatible – This item is compatible with MOLLE webbing.
  • 1 MOLLE Strap – This pouch has 1 MOLLE strap to attach it to MOLLE webbing.

Manufactured by:

  • Various Government Contractors – This item is manufactured for the US government by various contractors.

Country of Manufacture: USA – This product is manufactured in the USA.

Issue Type: USMC Issue – This item is genuine US Marine Corps issue.

Additional information


6 Color Desert Camo, ABU, AOR1, AOR2, BDU, Black & White, DCU, Flecktarn, Full Color, Green & Black, MARPAT Desert, MARPAT Woodland, Multicam Arid, Multicam Tropic, OCP Scorpion, Ranger Green, Snow Camo, ACU, Black, Blue, Brown, Coyote Brown, Foliage Green, Gold, Gray, Green, Khaki, Multicam, Olive Drab, Orange, Red, Sage Green, Silver, Tan, White, Yellow


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1 review for USMC Ontario Knife Company 3S Bayonet

  1. Max (verified owner)

    In my opinion the best current bayo, arrived in fantastic shape, and with the desirable markings. Super service from Venture. Thank you for the deal.

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US Military clothing in general runs in BDU sizing. If you are unsure about your proper size for clothing this chart will help you find your general size across all clothing, unless otherwise noted in the description.

XSR29-3267-7124 1/4
SS33-3663-6723 3/4
SR33-3667-7124 3/4
SL33-3671-7525 3/4
MS37-4063-6724 1/4
MR37-4067-7125 1/4
ML37-4071-7526 1/4
LS41-4463-6724 3/4
LR41-4467-7125 3/4
LL41-4471-7526 3/4
XLR45-4867-7126 1/4
XLL45-4871-7527 1/4
XXLR49-5267-7126 3/4
XXLL49-5271-7527 3/4
3XLR53-5667-7127 1/4
3XLL53-5671-7528 1/4
4XLR57-6067-7127 3/4

XSR23-2729 1/2 - 32 1/2
SS27-3126 1/2 - 29 1/2
SR27-3129 1/2 - 32 1/2
SL27-3132 1/2 - 35 1/2
MS31-3526 1/2 - 29 1/2
MR31-3529 1/2 - 32 1/2
ML31-3532 1/2 - 35 1/2
LS35-3926 1/2 - 29 1/2
LR35-3929 1/2 - 32 1/2
LL35-3932 1/2 - 35 1/2
XLR39-4329 1/2 - 32 1/2
XLL39-4332 1/2 - 35 1/2
XXLR43-4729 1/2 - 32 1/2
XXLL43-4732 1/2 - 35 1/2
3XLR47-5129 1/2 - 32 1/2
3XLL47-5132 1/2 - 35 1/2
4XLR51-5529 1/2 - 32 1/2

Customer Product Questions and Answers

    Is this the M9, M7, or is this another type of bayonet the USMC used that I never knew about?
  1. 0 votes
    Q Is this the M9, M7, or is this another type of bayonet the USMC used that I never knew about? answer now
    Asked by Bobby on April 11, 2022 2:38 pm

    This is not the M7 or M9 Bayonet. It is more similar to a USMC Kabar fighting knife, that is also a bayonet. 

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