Keep your AR-15 running smoothly with the CMMG AR-15 Standard Mil-Spec Cam Pin – Part #55BA46C (UPC 810046231418). This small but critical component sits at the heart of your bolt carrier group (BCG), guiding the bolt’s rotation during cycling and helping ensure reliable feeding, locking, and extraction on every shot. Whether you’re doing a fresh build, refurbishing a duty rifle, or replacing a worn cam pin, this CMMG mil-spec AR-15/M16 cam pin is a dependable upgrade or replacement choice. CMMG - AR 15 and AR 10 Builds and Parts+2MidwayUSA+2
Mil-Spec AR-15/M16 Cam Pin You Can Trust
The CMMG AR-15 Standard Mil-Spec Cam Pin is built to the same dimensions and standards used in military-style AR-15/M16 platforms, making it an ideal fit for most quality AR-15 bolt carrier groups:
If your factory cam pin is worn, pitted, or peened from thousands of rounds and hard training, this CMMG replacement restores proper function and helps extend the life of your bolt and carrier.
Durable Steel Construction with Matte Black Finish
When it comes to small AR parts, metallurgy and finish matter. CMMG builds this cam pin with durability and longevity in mind:
All-steel construction provides strength and impact resistance under repeated locking/unlocking cycles. MidwayUSA+1
Matte black finish (over stainless or carbon steel, depending on batch) offers corrosion resistance and a low-glare appearance that matches most BCG finishes. GunMag Warehouse+1
Manufactured in the United States, ensuring consistent quality and tolerances. MidwayUSA
This combination of materials and finish makes the cam pin ideal for duty rifles, home-defense carbines, training guns, and hard-use range builds.
Critical Role in Your Bolt Carrier Group
The cam pin may be small, but it performs a vital role in the AR-15’s gas-operated system:
Guides the bolt’s rotation as it unlocks from and locks into the barrel extension.
Helps maintain proper timing and alignment of the bolt lugs under high pressure.
Works in concert with the firing pin, bolt, and carrier key to keep the action running reliably. MidwayUSA+1
Over time, the cam pin can develop wear flats, galling, or peening—especially on rifles that see high round counts or suppressed fire. Replacing it with a CMMG mil-spec cam pin is simple preventative maintenance that can reduce stress on your bolt and help avoid premature failures.
(For safety and best results, inspection and installation should be performed according to manufacturer recommendations; if you’re unsure, consult a qualified gunsmith.)
Ideal for Builders, Armorers & DIY Maintenance
Whether you’re assembling a new upper or keeping a fleet of rifles in service, the CMMG 55BA46C cam pin is a smart part to keep on hand:
Excellent replacement option for worn or damaged factory pins. GrabAGun+2LIVENGOOD GUNS+2
Perfect to stock in your range bag or armorer kit as a spare—cam pins are small, inexpensive, and essential.
Great for budget, training, and duty builds where mil-spec reliability is more important than flash or gimmicks. MidwayUSA+1
Pair it with other core BCG parts like extractor springs, gas rings, and firing pins to keep your rifles running at their best. CMMG - AR 15 and AR 10 Builds and Parts+1
Key Features – CMMG AR-15 Standard Mil-Spec Cam Pin 55BA46C
Why Choose the CMMG AR-15 Cam Pin 55BA46C?
If you’re searching for:
“CMMG AR-15 Standard Mil-Spec Cam Pin 55BA46C 810046231418”
“CMMG AR-15 cam pin replacement”
“mil-spec AR-15/M16 cam pin for BCG”
…this part delivers exactly what you need: reliable, mil-spec performance from a respected AR manufacturer. It’s a small investment that can pay big dividends in reliability, especially on rifles that see serious use.
Drop one in your next build, keep a spare in your parts box, and make sure your AR-15’s bolt carrier group has the quality components it deserves.
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