$14.99
17 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The firing pin is one of those parts nobody thinks about until it stops doing its job. On a 9mm AR-9 build, the tip takes a beating every time the striker hits a primer, and after enough rounds the nose can mushroom, wear down, or start puncturing primers instead of denting them cleanly. This CMMG MK9 firing pin is the fix. It's a factory replacement piece machined from durable steel and designed to drop straight into your 9mm bolt so ignition stays crisp and consistent.
This pin is made for CMMG's 9mm AR-9 platform, including the Mk9 and Banshee line running the Radial Delayed Blowback system. It's a genuine OEM component, so you're getting the exact geometry and hardness CMMG spec'd for these bolts rather than a guess-and-hope aftermarket part. If you're running a CMMG 9mm upper or building one out, this is the pin that belongs in it.
Worn or damaged firing pins are a common culprit behind pierced primers and inconsistent ignition, and swapping in a fresh factory pin is one of the cheapest, fastest ways to chase down that kind of gremlin. Folks who've dealt with a beat-up tip on a third-party bolt have dropped this pin in and watched the primer-piercing problem clear right up, with the new pin still looking sharp after a few hundred rounds. It's a smart part to keep on the shelf if you shoot your PCC hard or run it suppressed.
Keeping a spare firing pin in your parts box is just good practice on any semi-auto you run regularly. They're small, they're inexpensive, and having one ready means a worn tip never sidelines you at the range or in the middle of a match.
It's built for CMMG's 9mm AR-9 platform, including the Mk9 and Banshee uppers running the Radial Delayed Blowback system. It's a genuine OEM part, so it matches the geometry and hardness CMMG designed for these 9mm bolts. If you're running a CMMG 9mm upper or building one, this is the correct pin.
The most common signs are pierced or punctured primers, light or inconsistent strikes, and a firing pin tip that looks mushroomed or worn when you inspect it. A damaged tip can also lead to gas leaking back into the bolt, which nobody wants. Swapping in a fresh factory pin usually clears up those ignition issues fast.
Yes, this is a factory CMMG component under part number 90BA4D7. Buying the OEM pin means you get the exact spec CMMG intended for the Mk9 and 9mm Banshee bolts, rather than an aftermarket substitute. That matters on a small, hard-working part where fit and hardness are everything.
It's a good idea for any semi-auto you shoot regularly. Firing pins are small, inexpensive, and wear over time, so having a spare in your parts box means a worn tip never cuts a range day short. It's cheap insurance for a high-round-count PCC.
| UPC | 815835014289 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 90BA4D7 |
You must be logged in to post a review.
Reviews
There are no reviews yet.