COLT AR15 A4 Firing Pin

Available from stock with us.

The Colt AR15 Firing Pin is an essential spare part for your AR15. The original part can be used in all MilSpec AR15s, meaning effectively all "direct impingement" models from nearly all manufacturers.

Please note:
Compatibility with weapons featuring gas piston systems cannot be guaranteed, e.g. SIG Sauer MCX Virtus, HK MR223, Haenel CR223, etc.

Product info summarized:

Platform: AR-15
Caliber .223 Remington

.300 BLK
6.8 SPC, etc.


not suitable for 9mm or other PCC
not suitable for AR10 & models with gas piston systems
Made in USA

In 1836, Samuel Colt receives the US patent for the first Colt firearm and builds his first factory. In 1847, Samuel H. Walker collaborates with Colt and the US Army to develop a stronger revolver known as the Walker. In 1867, COLT introduces its first Gatling Gun. In 1873, the Single Action Army Revolver is introduced, securing Colt a contract with the US government. In 1911, the "Model 1911" is officially adopted by the US government as a service weapon. In 1963, Colt receives its first government contract for the M16 rifle.