CMMG A2 Style Gas Block Sight Base Assembly - 2" Long - .750
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Product description
CMMG A2 Front Sight Base: Mil-Spec F-Marked Assembly with Bayonet Lug
Features
- F-marked front sight base with bayonet lug
- Fits .750″ diameter gas journals
- Includes front sight post and sling loop
- Made to strict military specifications
- A2 style design
- Approximately 2″ long
- Made in USA
The CMMG A2 front sight base solves the replacement problem for damaged or worn front sight assemblies with a mil-spec component that matches original equipment quality. This sight base works well for restoring correct military specifications to AR builds, replacing damaged components on duty rifles, and anyone building a traditional A2-style rifle with proper bayonet lug. Made to strict military specifications with included sling loop and front sight post, this F-marked assembly delivers the fit and function expected from genuine mil-spec parts.
Note: Installation requires specialized equipment and should be performed by a licensed gunsmith.
Specifications
- Brand: CMMG
- Model: A2 Style Front Sight Base Assembly
- MPN: 55DA338
- Barrel Diameter: .750″
- Length: Approximately 2″
- Style: A2 F-Marked (with Bayonet Lug)
What’s Included
- 1x A2 front sight base assembly
- 1x Front sight post
- 1x Sling loop
Customer reviews
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Questions & Answers 2
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Does it come with the pins
Cody · Jan 20, 2026AT3 Support Team — No, the CMMG A2 Style Gas Block Sight Base Assembly – 2″ Long – .750 does not come with the taper pins; they must be purchased separately (like CMMG's 1/16" x 3/8" roll pins) and installed using a proper dimpling jig by a gunsmith. Professional installation is recommended to ensure precise alignment over the gas port.
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How is it secured to the barrel
Cody · Jan 3, 2026AT3 Support Team — The CMMG A2 Style Gas Block Sight Base Assembly secures to .750" barrels via taper pins drilled through the block and barrel (two per side) after precise alignment over the gas port.
Warranty & returns
Backed by the CMMG Warranty!
CMMG Warranty
Seller warrants to Buyer that for a period of 6 months from the Delivery Date, all Goods will be:
- Free from any defects in workmanship, material, and design
- Conform to applicable specifications[, drawings, designs, samples and other requirements specified by Buyer]
- Fit for their intended purpose and operate as intended
- Merchantable
- Free and clear of all liens, security interests or other encumbrances
- Not infringe or misappropriate any third party’s patent or other intellectual property rights.
Inspection and Rejection of Nonconforming Goods
The Buyer has the right to inspect the Goods for a period of thirty (30) days after the Delivery Date. Buyer, at its sole option, may inspect all or a sample of the Goods and may reject all or any portion of the Goods if it determines the Goods are non-conforming or defective.
If Buyer rejects any portion of the Goods, Buyer has the right, effective upon written notice to Seller, to:
- Rescind the Order in its entirety
- Accept the Goods at a reasonably reduced price
- Reject the Goods and require replacement of the rejected Goods.
NOTES:
If Buyer requires replacement of the Goods, Seller shall, at its expense, promptly/within 30 days replace the nonconforming Goods and pay for all related expenses, including, but not limited to, transportation charges for the return of the defective goods and the delivery of replacement Goods.
If Seller fails to timely deliver replacement Goods, Buyer may replace them with goods from a third party and charge Seller the cost thereof and terminate this Order for cause pursuant to Section 20.
Any inspection or other action by Buyer under this Section shall not reduce or otherwise affect Seller’s obligations under the Order, and Buyer shall have the right to conduct further inspections after Seller has carried out its remedial actions.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.
