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Spare Parts

Bolt Assembly Bolt Assembly

Bolt assembly for the MF-50S and MF-50M upper receivers. Includes the proprietary Mechanically Assisted Pin Safety (MAPS) as well as the hammer drop safety. Comes as a complete assembly including the bolt handle and includes head spacing at the McCutchen Firearms factory.

Our Price: $495.00
5-Round Magazine 5-Round Magazine

Accuracy International 5-Round Magazine is a spare magazine for MF-50M models, AI and AICS rifles.

Our Price: $169.00
Lower Parts Kit Lower Parts Kit

Lower Parts Kit for the 50 BMG Uppers. Everything you need to outfit the stripped lower of your choice.

Our Price: $89.95
McCutchen Firearms MF-50 Series Firing Pin McCutchen Firearms MF-50 Series Firing Pin

McCutchen Firearms MF-50 Firing Pin

Our Price: $73.00
MF-50 Hammer, Spring and Retention Pins MF-50 Hammer, Spring and Retention Pins

MF-50 Hammer, Spring and Retention Pins

Our Price: $58.00
MF-50 Series Small Parts Kit MF-50 Series Small Parts Kit

The McCutchen Firearms small parts kit contains all the spare parts for any MF-50 series bolt head.

Our Price: $34.95
Bolt Handle Bolt Handle

McCutchen Firearms' MF-50 series features a large bell grip bolt handle, for greater comfort and operater ease.

Our Price: $25.00
Buffer Tube Buffer Tube

The DPMS AR-15 rifle length buffer tube made from Mil-Spec 7075 aluminum and features a matte black hardcoat anodized finish.

Our Price: $24.95
KeyMod Nut and Screw (Set of 2) KeyMod Nut and Screw (Set of 2)

KeyMod Nut and Screw (Set of 2)

Our Price: $4.95