CMMG AR-15 F-Style Front Sight Base

The CMMG AR-15 F-Style Front Sight Base (CMMG part no. 55DA3EA) is a front sight base from CMMG, machined to the F-style height used on flat-top AR-15 uppers so a front sight lines up correctly with a rear sight or optic mounted on the receiver rail. It’s the same style of sight base used on M4-pattern carbines with a removable carry handle, giving a barrel the correct front sight geometry without needing a taller A2-style base.

Key Specifications

• Machined to F-style height, matching flat-top AR-15 receiver rail geometry.
• Built for the AR-15 platform specifically.
• Sets correct front sight alignment when paired with a rear sight or optic on a flat-top upper.

Frequently Asked Questions

What’s the difference between F-style and A2 front sight bases? F-style bases are shorter, correctly aligning sights on flat-top uppers, while A2 bases are taller for use with a fixed carry handle.

Does this include the front sight post? No, this is the base only; the front sight post/assembly is sold separately.

Buy the CMMG AR-15 F-Style Front Sight Base

Order the CMMG AR-15 F-Style Front Sight Base from our Lubbock, Texas gun shop for fast, insured shipping—correct front sight geometry for a flat-top AR-15 build. Browse more small ar15 parts from our Lubbock, Texas shop.