The TacFire MAR121P Firing Pin Retainer for 9mm Luger & 5.56x45mm NATO Bolts is a precision-machined stainless steel component designed to securely hold the firing pin within the bolt assembly. Its streamlined, one-piece design offers a durable alternative to traditional cotter-style retainers, helping maintain consistent ignition and smooth cycling in compatible rifle platforms.

This dedicated accessory is ideal for shooters who want a reliable replacement or upgrade part for their 5.56 and 9mm bolt setups. Whether you are logging long range sessions, training, or simply keeping a dependable rifle ready for everyday use, the TacFire MAR121P supports stable operation and straightforward maintenance. TacFire’s attention to detail and commitment to practical, hard-working components is evident in this compact but critical part.

Key Features:

• Manufacturer: TacFire
• Model: Firing Pin Retainer
• Material: Stainless Steel
• Caliber Compatibility: 5.56x45mm NATO, 9mm Luger